I think I can help you a bit:Been trying to source drive train parts to build a shaft drive single speed but have had no luck finding the cog to mount to a coaster brake hub. Can you help?
A few companies still fabricate shaft driven bikes.
-BRIK bikes. They helped me out with a few components.
-Beixo. Also a company with shaft driven bikes.
These are Dutch companies. I saw a few US websites with shaft sets. I will keep my eye out for those since I can't remember them right now.
I have five shafts: Three with a threaded sprocket and two with the 'three slotted, singlespeed/geared hub' sprocket.
What do you need exactly? Maybe I can think about selling a shaft, but I rather keep the three slotted to be honest
Threaded.
Three slotted.