Hello Driftrider,
Well worth a look is the line of scopes from Thompson Center Arms.(tcarms.com) These scopes are especially well suited to muzzleloading firearms, come with a lifetime guarantee, and are among the prized possessions of myself and the folks with whom I hunt.
They sell for $115. to $142. through Fox Ridge Outfitters (foxridgeoutfitters.com) the #1 Master supplier and Custom Shop for Thompson Center Arms. T/C doesn't sell to individuals. We have hunted with these scopes for years and have never been dissapointed in any way. I sure hope this helps you in your quest. My best, Bradley J.