Hi,
here you go :
-http://www.amazonas-tropic-aquaristik.de/
-http://www.tropic-aquaristik.de/ ask for Marc he is a good friend he can get almost everything... =)
-http://www.aquarium-stahl.de/
-http://www.aquatarium.de/home/index.htm lots of crenicichla this is his site
crenicichla.de
-http://www.amazon-aquatics.de/_html/aktuell/index.html
-http://shop.tropicfish.de/
-http://aquazoonas-home.de/
-http://www.teichmann-aquaristik.de/suesswasser_aquaristik_wuerzburg.html
-http://www.aquariumglaser.de/de/about_us.php
this is one of the biggest importers in europe (world ??) he don t sells to private persons but maybe you can visit him it is not far away from your location and trust me you won t be disapointed it is GIGANTIC and he has a lot of good BIG rare stuff from SOuth America, Africa, Asia etc. i was there and i have never seen so many big oddbals, predatory fishes and rare things.... the problem is that he sells them to Japan etc. very expenisve .. =) but maybe you can arrange something, if not i can order something for you...
Greetz from Hamburg