You might want to check out the N-SSA (http://www.n-ssa.org
) and see if there is a local group you could check out. There you can see a whole host of Civil War-era black powder muzzle loaders.
As was said, a lot depends on what you are into and what you mean by "traditional". Are you looking for a match lock? Flint lock? Percussion? Are you looking for a rifled barrel or a smoothbore? Are you after some particular era in history?