one of mine is printed. I used a normal ali spacer then printed a filleted piece around it to give the shape I wanted. purely so I could nearly slam the bars.+1
They just look right. I saw a build the other day of a Quantum Pro with super modern kit black on it and it looked ace. Deep rims, but not too deep. I nearly bought one of the cheap f+f's , last year. I think it was a Stage.
3D printing is another option to get the perfect look.