Be careful with the part numbers !
The Bosch # in the OP post may have been superseded according to an old post in Renntech ? F 00M 145
225 or
350 ?
See more here and DIY + photos:
Alternator repair - Regulator replacement - Pelican Parts Technical BBS
Here is the Renntech link:
http://www.renntech.org/forums/topic/36753-where-to-buy-voltage-regulator/?_fromLogin=1
YEMV