Have you tried Cabela’s? I found that our local one has .22’s and believe it or not; .22magnum ....
They just opened a Cabela’s near me, but I haven’t been in there yet. .22 magnum has been even a more rare find.
I bought a Henry .22 magnum lever about the time he got elected and haven’t been able to shoot it much. They have it at the range, but it’s steep.