I didn't expect that a company like that would accept a one-off order that costs as little as you say the dice cost. (I assume you spent several hundred dollars at most.) I just figured that anyone who says "aerospace" wouldn't bother doing business with me, but I guess I was wrong.
Do you know what sort of sintering technology they used? I got to order custom parts laser sintered from tungsten at a job I had, which was pretty cool.
Sometimes lower cost meal 3d printing can be done with normal fdm machines with a very high metal content filament, then sintered together and the binding vaporized out in an oven after the fact. I don't know if that was the process used here though, or if this was SLM.