Here is another gentleman that makes custom RB moulds, though I have not had any contact, with him, for some time. He's a retired Master Machinist and is known as 'Cannon Mike.'
http://www.users.qwest.net/~cannonmike/During the pendency of my Allen Martin Newcomer/Fondersmith build, I commissioned a 'period correct,' steel, three (3) ball 'gang mould (1X.630 + 2X.625) from him. It was fully stress relieved and heat treated. Upon completion, I sent it to Tim Ridge of Swamp Fox Knives who crafted turned handles of Curly Ash, with turned brass ferrules, for it. It was a thing of beauty and fully utilitarian- like the smoothrifle it was built to accompany.
Regrettably, I deleted my digital photos, of it. Perhaps someone, here, can persuade the CLA European Correspondent, who has custody of this set/gang mould, to present a few photographs on ALR, for us.
We're fortunate, today, to have so many talented craft/trades people, to choose from, quite literally at our fingertips.