If you cast bullets, Accurate has a heeled mold design that will work well. Tom will cut the diameter to whatever your bore slugs to, so the heeled design can be customized to your gun's barrel. Brass for .32 Long can be purchased from a fella on Gunbroker who sells modified .32 S&W Long brass he reworks to be .32 Long.
I load for the American .32 Long heeled in a couple Ballard rifles, and it's a wonderful cartridge to shoot. If you decide to reload for your rook, you wont be disappointed in shooting it if the bore is great!