Percussion swivel breech kit?

[FrankenMauser]

As of late, I've been finding myself more interested in a swivel breech muzzle loader rifle.
However, I don't know that I'm ready for flintlock, which seems to be the predominant type of swivel breech build. And I don't have the equipment and tooling to build one myself (yet ).

Is there a percussion swivel breech kit available?

 

[Wyosmith]

I am making 2 of them in the coming year, but both are flinters. I could probably do one for you as a cap-lock if you'd like. PM me if you want to talk it over.