jrkrk,
I read your questions,then went to T/C,s site to look at the Penn.(i never had one)
The common perc. lock used for the Hawkin and Renegade is different.
(these I have had)
The Penn. has a purty front on it,where the commnon T/C lock is round.
I'm sure someone has done just that. But it's not a "drop-in", It would take some lock and new barrel work, best guess, about $300 parts.
T/C won't tell ya (why would they want too?) But they'll sell ya another gun.
see my point?
Let's see what others say,