Contact to Schlund+Partner?

Hi, I just saw that php3.de is mirrored by Schlund+Partner. Now, I need your help: I'm a member of the FFII (you might remember it from the online demo) and recently had the idea to organize a fund raiser similar to the one done by Blender some time ago (nothing is decided yet, though). To do this reliably, IMHO, the best solution is to use a professional web shop environment and tune it to our purposes. Schlund seems to offer nice web shops. Now, the problem is to 1. create such a shop quickly (once we have decided to do that fund raiser), maybe as early as tomorrow or sunday. 2. know how to tune it to our purposes (we need a money meter, a list of donors, and maybe a way to automatically send donation receipts). Does anyone know whether the people at Schlund might be able to help us and how to contact them? Felix