Where can you get .30 caliber rimfire ammo for antique pistol?

Both the .30 Short and the.30 Long rimfire cartridges went out of production about 1917-1920. They are considered an obsolete cartridge, and have not been seen by most folks that are not cartridge collectors. Single specimens are traded and sold by collectors, but are not likely to be shootable due to age. They are also $2-5 per cartridge, and would be rather pricy to shoot. Sorry-