John,
The very best set you will find will be found at Precision
Oil Pumps, in Madera, CA (559) 645-1951. They have a website but I don't even think they have a photo up they are so rare.. They are not cheap but they are the very best. The rocker arms are blue anodized billet with bronze bushings, roller bearing ends, the rockers are drilled for oiling at the roller as well as the push rod.. The rocker arm uses a ball / ball rather than the weaker ball / socket, which is prone to break.
Options include (matching) billet rocker stands, billet rocker shafts, billet spacers (replacing the springs) and bronze shims.. Each set is shipped with a rebuild kit..
Total cost for everything was about $900.. You can get just the rockers and chromoly push rods for $485..
Photo's are coming.. I'm too busy working to pay for this stuff to install them.. Doug Garifo, the owner is a good guy and has other fun stuff for FE's..