While some retailers that don't sell a lot of it may stop stocking it, Fuji makes a lot and is likely to continue. It is widely used in one-hour labs even to print from digital files. Here in US, B&H, Calumet and Adorama all have stock. All Crystal Archive is now optimized for digital exposure, but works fine for optical exposure. It is quite fast, though, and may require some stopping down to give long enough exposures for accurate dodging and burning. You can also reduce light by adding neutral density with same amount of each filter (Y+M+C). Expect to see fewer options in sheets in the future as most of the production will be going into rolls for digital exposing machines.
Bob