you can pretty much make your own wads and cards .
myself i punch my own out of horse hair padding for my 20 gage's , using a spent Co2 cylinder . cards are not very exspensive even from ToW. but you can punch those out to .
You could go the PC way and use Tow or wool for wadding as well as over the shot .
there are lots of different options to include making your own paper shot cups . for Round balls in some of my smoothbores , i even get better results by using a wad , ball and card vs. using a patch
but like rifles , each smoothbore often likes different things , so it takes some time to figure out exactly what your Bess will like