does anybody know where to get Bosch turbos or kits?

[mudduck3006]

i been looking for bosch turbos and or the kits for a while now and the only place i found them are on the mercedes and saabs themselves and i have been told they dont exsist at all by some clown at a online place. and my turbo has robert bosch gmbh on the side and a bunch of patent numbers too . i have also been told tehy are made by garret but garret denys this and i found from a old and i mean old mercedes manual that they are designed by bosch for mercedes benz my dad used to have the full bosch company manual for turbos. plus i have been told staight out crap like bosch doesnt make dynos or anything they are all made by some other company crap if anyone knows where to find em new or rebuilt or a rebuild kit it would rock