Yes, my mistake. I meant 67 Design. I think my problem (among the many my wife claims I have lol) is the picture of the ball mount on 67 website is a very poor pic and looks nothing like the OP's pic here. Either that, or his pic is so good it is making the balls look like shiny metal. Maybe it's just the light reflection.Builtright only makes the mount itself. Not the balls. That is 67 Design.
Anyway, just ordered 3 balls with mounting plates, 2 CF matte arms (thought I preferred shiny but they are out of stock until mid june; thought shiny would match the CF interior of the Raptor better but matte is fine), and some other piece that allows different sizes to be used. $175 in all.
Again, ty to the OP for this excellent thread.