A while back I had posted a question about custom, or odd size, ball mould sizes. Wanted, if not needed, something a tad smaller for my Caywood French Type D tradegun. Had thought Ray Pine dropped off the end of the world. Nope, he just doesn't have a dealer at this time.
For $2 you can get a catalog from the Rapine Bullet Mould Mfg. Co, 9503 Landis Lane, East Greenville, Pennsylvania 18041, phone 215-679-6442. No more credit cards, "...add $8.50 SHI per item. Add .50 per item ther after...overage...will refund..." I don't precisely follow this either, so what he has a good variety of moulds available.
Round ball moulds of interest to me include .590305 and .595310, single cavity in these large sizes, $89.95. Aluminum alloy (good idea to lube w graphite before use). Primitive steel bag moulds $69.95
As the Michigan summer cools down its time to get to shooting flintlocks again. My aged body of excessive diameter does not care for these temperatures.