This site has a diy on rebuilds http://v12uberalles.com/throttle_actuator_rewire.htm

I bought mine (for my E420) from this place: http://www.4mercedes.com/600v12.htm

Good luck!

__________________
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D