In reference to Clockman's question about a source of parts, the following applies to the subject rifle. The barrels are Green Mtn. swamped by me, the lock an L&R John Bailes, cannibalized for parts, and the butt plate from Reaves Goehring. The balance of parts were formed, cast or shaped from commonly available raw materials. The triggerguard is from a pattern I made and then cast of brass in a small foundry at my business. Screws and rear sights were made by others. And if one attempts an exhaustive accounting of sources, something is surely missed. My disclaimer. Ha!
I should by all means add that Dave Waters book on building a swivel breech rifle was of significant help, and David Price was a big encouragement to me as well. Both men are ready to help if the bug to build one of these relatively rare birds infects or afflicts you. I also talked with Bernie Tulino about his swivel action, and any such conversation will advance the motivation, if you have the bug.
To Californiakid, I am not a close relative to the Steffys in Ephrata, but surely they are related at some point in the not too distant past.
