Any heeled bullet made for the .32 Colt will work.
Here is another article on what another shooter did:
I have a couple of moulds for a .38 short colt from this feller, and I know he makes heeled bullets for .32's and .38's:
Barney Fife: "Nip it, nip it, nip it!"
Andy Griffith:"Oh now Barn'...."