Your correct on the old company, Rocker Arm Specialitys, being sold and then going under. One of the original partners died and the other one sold it. He, Gary, took it back and got it going again as RAU and he has now resold it again is what I under stand They are making new stainless steel rockers for the older Gen 1 Chrysler and after market race motors also that use those type heads
I do have two sets of the original ductile iron rockers that I had them blueprint, rebuild and bush and change the ratio to 1.6 on one set last year, the other set is still 1.5 ratio. I have his chromemoly steel hold downs and banana groove specail H.D. shafts also, both sets are a mix of different brands, Isky, Mopar, Crane and Ersons I would sell the 1.5 ratio set as I'm switching to the higher end race paired shaft rocker arm sets now due to that I'm using solid roller cams, more spring pressures and revving the motors to higher RPM