If those are an inch, I have a mc Gowan #3 that's within .150 at the measurements. There's a stainless proof here also about the same....all requiring shifting the shank around to work best.

Originally Posted by BrentD

I would not buy something that runs on any kind of primer given the possibility of primer shortages and even regulations. In fact, why not buy a flintlock? Really. Rocks aren't going away anytime soon.