mykeal , Iffn' they had em they'd a used em.. Now I know you have heard that gag! LOL
Ken, Unless you have a medical condition, that type of scope is just a nasty idea. I know nothing of PA and hunting laws, so if you want a scope like that which will cost as much as the gun with mounts, perhaps a inline would be better suited.
It is possible to get repro scopes, but these dandies are a tad pricey as well and were far from common. Maybe if you do go with a flinter in a PA style and go with that type scope you should wear a brown hunting frock to match.
Of course this is America and you are free to choose, and do what ever you like, but if you hear laughing out hunting one day, you will know why.
I am not trying to rub anyone's nose in anything, but to me and probably other guys here this is like saying you want a rail to mount a flashlight, laser site, and also you wonder which pistol grips you should place on the forearm and back behind the trigger..
So now I wonder if I will be recieving a warning... So be it it had to be said.