Here are some more that I know about

I'm sorry I don't know of anything in the EU, but here are some very helpful websites.

http://www.modelhaus.com/

http://resinrealm.net/Star/STARModels.html if you like american cars in any way, click on the R&R resin link and click on a marque in the righthand column to see the kits... that one's kind of tough to find. All links on this site have some interesting stuff.

http://www.tcpglobal.com/autocolorlibrary/ This one is fantastic for finding out original colors! they have the old paint chip catalogs online! You can look up by year/make to see authentic factory colors for your subject.

http://www.reliableresin.com/products.html has engines, wheels, etc and some bodies

http://www.perrysresin.com/

http://www.rocketfin.com/model_car_links.html a mother lode of model car connections