They must be made that size for some sort of industrial use; does anyone know anywhere?
I also had problems trying to find one of these large poly survival bags a while ago. Then, after a flood, I found one floating all loose, partway through Far Sump in Peak Cavern. Gathered it up & brought it out. Hosed down inside and out & carefully dried it then folded it back up. Still using it!
It's extremely sad if we're losing Caving Supplies altogether. I've had donkeys years of excellent service there, often receiving help well beyond what could reasonably be expected. Thank you Phil and Chandra and team; enjoy your well deserved retirement!