[Vwdiesel] O-ring for throttle shaft

[Terry Briggs]

Does anyone know where you can get an O-ring for the throttle shaft 
that goes into the top of the ip ? I took an old ip apart to see how it 
comes apart, pretty simple really, but the one on my golf is worn and 
leaking by just enough now for me to notice  { harder to start when it 
usually poped off first crank} I know that o-ring is bad, when it's 
parked and you move the throttle shaft by hand it whistles, barely, but 
you can hear it. I heard that Bosch no longer sells parts for the pumps 
to us  backyard mechanics, any suggestions ?

Terry Briggs
Third Wheel Engineering
2576 King Circle
Corning, NY  14830