I know of no one making the .32 rimfire anymore. I don't believe cartridges have been made for more than 20 years, perhaps longer.
I have a Marlin model 1892 lever-action rifle that can fire the .32 Short rimfire, if I switch the firing pin. I keep an eye out for .32 rimfire ammo but rarely see it. And when I do, it's always old stuff that is more intended for cartridge collectors than shooting. Typically, a box of 50 will run $80 or more, depending on vintage or condition. Too expensive and rare for shooting.
I have seen newly manufactured .32 rimfire ammunition in the past year. Someone was shootng an old top break revolver with this ammunition. I believe it was made by Fiocci, but I could be wrong. I am sure that an internet search would turn up more information.