I found a schematic for a Pietta 1862 Spiller and Burr on VTI. Also found the parts listed on a site called Taylor Firearms. Anyone ever heard of Taylor before? It's a new one on me and the prices are about half to two-thirds those of VTI. Probably go with VTI since I've done business with them before and trust them.
Here's a couple of pics of the pistol from the auction site. It looks as good in real life as it does in the pics. I'm thinking for $160 I may have done good by myself. lol