Ace hardware sells them, I have 5 or 6 boxes. i will not dip into wax tho, as they can be used to re prime spent pistol, rifle primers. I have heard shotgun primers as well. just take the anvil out of the inside of the spent primer(remember that the pointed end will need to put back in the same position) with a fine finnish nail, use a punch to hammer the firing pin dent flat, use a pair of needle nose pliers to break all the red and white stuff off the tip of the match, and use a hammer or rolling pin to crush ito a fine powder. about 3 match heads will fill a small pistol primer. use the match stick to pack the powder back into the primer cup.reset anvil and your good to reload.
The primer will be corosive, so make sure you clean the gun like you would a BP rifle, or pistol, or shotgun.