I bet if a boutique cartridge manufacturer tooled up to make .22WRF, .22 Remington Special, .22 Autoloader (same as .22 Remington Special, I think) .25 RF Long and Short, .32 RF Long and Short, and .38 RF Long and Short, he could sell all he made. There is a huge number of those guns languishing in closets, barns, and bordellos across our fair land.
Aguila /Centurion did it with the 5mm Rem Rim Magnum..............and there were only ever 30-some thousand rifles made in that chambering, ever.
Had to be SUBSTANTIALLY more of the above made and still around somewhere.
