I saw on another site that someone (I think Southern Ohio Guns) was in the process of importing a batch of .32 rimfire. I don't know if it is Long and Short or just Long. I have a fair supply of the old Navy Arms ammo, but wouldn't mind getting some more.
I know some authorities insist that no smokeless powder ammo should EVER be fired in a black powder era gun, but I have done so with no problem, as the makers keep the pressures low. I do agree that some guns, like those old revolvers with paper thin chamber walls, should not be fired with anything.