DCX offers parts pricing online in Germany:
http://wwwsg.daimlerchrysler.com/Projects/wi/cda/etpl?ETNR=A0001416525&from=query&etpl_lang=
My TA (Schieber) A0001416525 for M104 is priced at EUR 650 =$ 800. Some dealer would handdeliver it for that margin
Good luck
Reinhard