Thanks for link to the mold mfg. tip NorthFork !@Bushfire
This guy also makes molds if you can't find what you need.
https://www.martysarms.com/products/round-ball-molds-inch-sizes
These multi-cavity molds are a great deal for those of us who shoot orig. firearms.
Original Colt & Remington revolvers require larger diameter balls than the repros.
Relic shooter