OP, before you do anything rocker wise, you may call Mike at B3 racing engines and see what he thinks about putting bushings in the rockers you already have. Other than the needle bearings, there is nothing wrong with those. Press bronze bushings in them, score some new shafts, correct the geometry and don't look back.
That may be cheaper and better than starting over with new rockers. I'm pretty sure he has the tooling to do that. I used to, but that was all stolen by a common criminal and sold to a bunch of production rebuilders in Mexico (true story) who have no idea what all they bought.