I us wads cut from cereal boxes, 0.029 thick. I also found a source for thicker wads. New washer and dryer came with cardboard corners for protection during shipping 0.060 thick. I have also used milk carton wads in my 38-55’s with good results. Princesses Auto sells a set of hole punches which covers most of my wad sizes. I have had to hog a couple out to get the correct size. For about $20 it is a good investment. They are also used to cut wads for my 16 and 14 ga double shotguns, caplocks.
I would rather cut my own than being dependent on a store possibly having them.
If your going to order them get more than you think you will use because they can be hard to get.