Make your own wads!
Get an 1/2" punch, get some felt, and go to town. You could make wads the first day to compensate for purchasing them.
I use wadded up patches.
Nothing wrong with a pin. If it has a staple, then a wedge will work well. If it is dovetailed, then you will have to make your own. Dovetailing is simple. Just go slow. Measure, than measure again, and again. You cannot replace metal. Removing it is a snap.
When I had a pin system on a CVA, I put brass tubes where the pins went through the wood. They never wore out. I used pop rivets as pins. Good, hard, and lasted a while. They took a #48 drill.
That looks like a good rifle.