I’m having a tough finding specific weapons and ammo. I’m guessing more would have been sold if it werent for COVID.
https://www.msn.com/en-us/news/us/guns-and-ammunition-businesses-affected-by-covid-19/ar-BB19Svrf
Cheaper than Dirt has been advertising that they have ammo - and guns I think.
The People’s Cube Satire site has a link to the following(Don’t know if they sell what you are looking for but it’s worth a look/try):