I'm thinking it's simple enough that you can make'em yourself.
From the stories I have read about that bike builder, a lot of what goes on hisbikes, he finds and changes a little to work for his needs. The intakes on the carbs are found items and the finish on the engine is from a rattle can of paint.
Maybe look around for a motorcycle shift lever that will fit the splines on our bike, cut it short, polish it up and figure out a way to put a nice threaded shift ball on the end from your local speedshop. ****, drill out an 8-ball and put that on there. It's a hotrod after all...have fun with it.
Or look on the custom Harley sites. I bet you'll find one.
If you make one yourself, you'll sure like it a whole lot more. =)