You might wish to purchase a catalog from Track of The Wolf as they are about the best supplier of all things traditional muzzleloading.

http://www.trackofthewolf.com

I buy everything from them and customer service, tech support and pricing are all just great.

Traditional muzzleloaders are quite simple. The guts and function are pretty much like the right side of a sidelock double barrel hammer shotgun.

Another great outfit is The Rifle Shoppe

http://therifleshoppe.com

who supplied all the parts for my 1809 Baker 61 caliber rifle.

Warning: it can become addictive !