Most paper beddings would be decent alternatives - years ago Comet and Blitzen were on Carefresh til it because too difficult to source it regularly (and at a reasonable price). If it doesn't work out with the Fitch, Back2Nature, Megazorb and Aubiose are the ones I've seen used by other members. Never used Aubiose myself, Back2Nature is great but the pellets can get heavy once soiled - still my favourite option, though. Megazorb isn't bad either, although it has a smell that can take a bit of getting used to. Not a bad smell, just off if you're not expecting it. Some people also find it dusty, never had an issue with it myself.