There seem to be 2 main UK online shops - OnTracks and Guagemaster.  I've used them both and have found that On Tracks is usually slightly cheaper, but takes longer to arrive than form Guagemaster, who seem to hold more stock

http://www.ontracks.co.uk/index.php?page=catalogue&cat=1218

http://www.gaugemaster.com/prod.asp?sid=63&cid=193&mid=600&style=

I've also found these guys - I HAVEN'T USED THEM YET - so not an endorsement, but they do seem very cheap

http://www.modeldepot.co.uk/cgi-bin/commerce.cgi?product=Faller!Fairground_rides&cart_id=1228147425.12407

Also GERMAN EBAY is your friend here.  Go to www.ebay.de and search on "Faller Kirmes"... then next to the price column on the results of your search there's "Versand Nach DEU" - Click on DEU and search for Grossbritannien - then you'll see all the sellers that offer postage to the UK built into their adverts. 

Some haven't built it into their ads, but mention it in the text.  If your German isn't up to it (mine isn't) you can use Google - Just to the right of the Google box there's "Language Tools"

Click on this and you can cut and paste whole chunks of text and translate between German and English

So you've got to check if they'll post to the UK (or whatever country you're in) and that they accept payment in a way that you're comfortable with - for me this is PayPal.  You'll find that a lot of the everyday people (ie they don't have an Ebay shop) on German Ebay don't accept Paypal

Another way of searching is to search on the faller model number, for example search on "140433" for Circus World.  Using this method you'll probably get a list of products with Sofort Kaufen - this is the "Buy it now" price.  You'll find that most of these products will be in people's Ebay shops, so they'll have other Faller stuff as well.

I've used these guys very successfully in the past

http://stores.ebay.co.uk/powerball12-Faller-Bausatze

http://stores.ebay.co.uk/Joes-Modellbahnladle

Also - Look out for the phrase OVP - I think it means "unopened in original packing" or something like that, and as all Faller kits come wrapped in cellophane, it's good to know that all the bits are there

Another tip - If you're after some of the earlier models leave off the "140" or whatever the first three numbers are - so rather than searching for "140433", search for "Faller 433".  I guess Faller changed their numbering system a few years ago

Same story as the fairground models - There seem to be 2 main UK online shops - OnTracks and Guagemaster.  I've used them both and have found that On Tracks is usually slightly cheaper, but takes longer to arrive than form Guagemaster, who seem to hold more stock

http://www.ontracks.co.uk/index.php?page=catalogue&cat=1218

http://www.gaugemaster.com/prod.asp?sid=63&cid=193&mid=600&style=

Also GERMAN EBAY is your friend again.  Go to www.ebay.de and search on "Faller Car System"...Read the warning in the previous box about payment methods 

It's also worth joining the Yahoo Groups Faller Car System group - a good source of help and advice on making stuff work

http://groups.yahoo.com/group/Faller_Car_System/

This HO scale Von Roll Monorail set, first available for the 1988 opening of the Sydney Monorail, made by now defunct E-R Models.  It includes a 52" X 40" loop track. Additional track can be purchased. 

You occasionally see them on ebay, often used, and often quite expensive

This fellah here in Australia has new original stock, posts anywhere in the world - Can works out cheaper than a second hand one on ebay from your own country

http://www.grandcentralrail.net/index.php?categoryID=111

For want of a better description....or...Electroluminescent Signs

These things are brilliant.  they don't seem to feature on any UK sites, but I stumbled across www.microstru.com home of miller engineering and their fantastic signs.  They're reasonably priced, really good quality, and having ordered 2 packages from their website now, get delivered to the UK within 5 days

So far I've received....(and they are actually better in real life than they are in these pics)