Try "the gator" Blackmon. Gator gaschecks. Lives here in louisiana. Don't know if he makes those sizes but at worst you can try a google search and ask. A lot of the shooters over at the castboolits@gunloads.com there
do use his gas checks. Every once in awhile they do a group buy sometimes ending up ordering thousands of thousands of gas checks. I know from first hand experience because I have ordered 30cal, 32/8mm, 357, 44,
and 45 rifle checks during these buys. Buying in large numbers gets the price down below what the shooter's supply houses charge. When you get one or two boxes a couple thousand checks sounds like a lot. When I order its normally 5000 checks of one caliber at a time. Beats looki at your stash and saying to yourself "gee gotta get some more" next thing your out. Larry's checks are well made and I have not heard of any complaints from folks who have bought from him. Just might be worth looking into on the castboolit site and see how many you can get and what sizes are available and of course $$$$$. These are not hornaday or lyman gas checks. With all the termoil going on in the gunworld today it just might be a prudent move.Funny thing, Obama isn't sworn in as president yet. And he's given the gunworld probably the best season in years.
I knew a dealer who specialized in black rifles you know the ones every one wants. He can't keep them in his shop. One dealer went to a recent show with 26 black rifles 1st day they were all gone. he had to call the maannager where they make them to get resupplied. If its got A in it or a b in it they are cranking out stuff as fast as possible. Frank