Source for Throttle Shafts

[Brent Kasl <kasl100@navix.net>]

Are replacement throttle shafts available for the twin Stromberg 150's? 
Also, are the bushings normally replaced at the same time, and are they 
available? After the car was running, we took the advice from the list 
with some carb spray on the shaft outputs and discovered air leaks on 
the back shaft. Is it best to replace the entire assembly? Thanks Brent