I think there may be a market, but:
The exhausts aren't needed if the exhaust duration is higher.
That removes 1/2 the details, only need left & right.
The really small intake valve stem angle (it's not vertical) is can probably be ignored safely, making the rocker a see-saw with the adjuster ball center, the shaft center, and the roller axle directly in line.
The actual intake width (nominally 15/16" = .9375") is slightly over 1" with the valve-side lever overhanging the body a tiny bit. The basic design can be split length-wise, and L & R made by simply reversing the sides to "point" the lever at the valve.
A ratio increase is what most people want. The B&B was advertised at 1.7:1, which probably means the adjuster was moved toward the shaft by about 5/32" to 3/16". This is probably safe, although the pushrod clearance hole must be elongated.
I suggest a bushing rather than needles for the shaft.
The price could be reduced a bit by using a radiused pallet instead of a roller tip. The very long lever makes the thrust angle smaller than common V8 rockers. If the body is aluminum, the pad must be attached (duh) but if it were steel plate it only needs local hardening.
