Ok, I found out that Risse made a good cartridge for this fork, but I've been unable to locate one so far.
EKO Sport (which is now MRP), makes an air cartridge for my fork. They have a 72 mm in stock and an 85mm which requires modification. They cost $125. White Bros. and RCR made cartridges, but supposedly they are worse than the rockshox cartridge. What should I do? ...and please don't tell me to buy a new fork. I'm determined to fix this thing. By the time I replace the headset and stem with threadless, buy a Judy tt, J2, manitou axel, or whatever, and ride it for a few months, I'd be looking at doing the same upgrades to that fork. Besides, I already bought the springs and elastomers. Oh, and this might sound like a dumb question, but bear with me, I'm new at this. Do I need a cartridge in both sides, or just one? Any advice from a guru out there would be greatly appreciated....