I have a CVA StagHorn as well, I picked it up at Dick's sporting goods as a kit. It included all the cleaning supplies needed, breechplug tool and a pack of power belt bullets for just $139. I put a Bushnell 1-4.5x on it ($64) and let me tell you the gun shoots like a dream. I sighted it in at 75 yds and I consistantly shoot better than 2" groups with it. Why pay more for a muzzleloader?
Good luck with your search!