hmm, I doubt you will find carbon fibre split rings, the standard epoxy resin that it is composited with doesn't bend. you could perhaps make some or have some made if you can find a suitable composite material. I can't think of any off the top of my head, but a firm rubber may work.
that 'biner says not for weight bearing use but one wonders how much weight could it hold?
carbon fibre is somewhat brittle, I wouldn't trust it when my weight could be dropped on it suddenly. Half way down
this page (NSFW) is a good example of that.