Yes I forgot to mention the "newer X Duro Pro" model , which was discontinued a few years ago. What Duro means is a heavier built like Stihl chain are, but with a slightly wider kerf.Here's what I could find,
75CJX100U - DURA PRO(TM) CHISEL CHAIN 3/8" http://gilbertmowerparts.com/75cjx100u-dura-protm-chisel-chain-p-631.html
75CKX100U - DURA PRO(TM) CHISEL CHAIN 3/8" http://gilbertmowerparts.com/75ckx100u-dura-protm-chisel-chain-p-636.html
I found a price on the 22jp, but nothing else! http://www.sourceapart.com/index.php?route=product/product&product_id=715406
Sorry, not much help here.
I gave $200 for all that and went back and gave $150 for my F.I.L's roll, I knew the price was fine. Still got a half roll of 36RSLF on tap too