My best friend Layne Hendrickson would probably love to work with you:[url]
http://oaklevelforge.com/[/url]
He is working towards affording a fine Kentucky flintlock for shooting and deer hunting back home in Kentucky where we're from (and where he lives, darn him!), and I know he'd love to work on a muzzleloader-related custom project. He's fairly cheap also, from what I gather (not knowing much personally about the costs of blacksmiths).
If you contact him, tell him Liam Graham sent you!
Best of luck to you!
Liam