preiswerte Ersatzteile

Sorry I write in English! I can easily understand German but not write it.
Where can I bye BMW parts for my car in Germany at good price in Germany. I will be in Germany in the end of May this year. I will be around Frankfurt am Main (Mainz or Wiesbaden). I am looking for some store like eurocarparts.co.uk in England, where I can bye service parts, braking parts, steering and suspension parts, engine parts etc. brands like Bosch, febi, NKG, Boge, Sachs, Hella, Behr, bosal, Bilstein etc. I have been searching for store like this on the web but without any success. It would also be great to get some webpage to find the nearest store from my locations. I need parts for about 800 Euros so good prices are important. I know I can get it all from the dealer but it too expensive for me. I am from Iceland and spare parts are very expensive in Iceland.
Bjarki
730iA ‘90