Dig around the Antiques forum. There is a company in France that makes and sells adapters that use Acorn blanks to light off a small powder charge. Reloadable.
Other than that, you are chasing after the ammo that every guy that has a 32 RF pistol is also after. It's pretty nearly all 50 years old or older, figure on paying a buck a round anyways.
Good luck!
Cheers
Trev