My neighbour owns a Remington Rolling Block No 6 chambered for .32 Long or Short Rimfire.

Is there any chance one can get hold of some ammunition for this one?
I know it's possible to rechamber it for a centerfire version, but he doesn't want to.

This is all I have found so far: http://www.ammo-one.com/RimfireCartridge2.html

Also posted in the single shot forum. Hope that's ok.