Congrats on the shotgun, and good luck taking your tom with it.
I'm relatively new to the world of black powder shotgunning myself...I bought a 62 caliber flintlock trade musket last year and have been playing with it. I get my wads from a local place called "Kenockee tradin post" near Port Huron, MI. They don't have a website, but they do have their address and number on a number of black powder sites and they do have a catalog. If you can't find thier address/phone # via google or some other search engine, let me know and I will try and look it up for you.