You might find the Excessive Force CDs, since KMFDM just re-released these CDs remastered (they have been out of print for like 10 years), but the rest of that stuff you probably won't find at a store, unless you have a store in your area that specialized in underground music.
If you are serious about picking any of it up, I can point you in the right direction. Of the stuff that is available, mail order will probably be the only option, and for the out of print stuff, eBay or GEMM would be the best.
Out of all the music there, I recommend Dead Hollywood Stars the most. If you can find "Junctions" and "Gone West", I would DEFINITELY buy them. Absolutely amazing stuff, imho.
Bart