I looked all over the place for the correct pinions needed for this mod... I bought some pinion gears from a few diff. suppliers. One set wasn't quit long enough and the other set had a tad too big of a diameter. Couldn't get answers from them prior to purchase, so I took the chance and bought them anyway. They were only a few bucks.
So, I talked to someone at SDP/SI (Stock Drive Products / Sterling Instrument). I gave him the exact measurements. The rep directed to me to the parts on their site where I could purchase some pinion stock. It is sometimes nice to get live help over the phone instead of by email.
https://www.flickr.com/photos/146664.../shares/78471Q
So I bought 2. They are what I was looking for. Now I can just cut them to the correct length. Oh, and drill the 2mm bore. I better do that first..
Also, I going to see about getting the original gearbox repaired.