You can buy something like this here in the US.

The roll is smaller, and they market it as being made for camping (takes up less space in the pack, etc). It also, of course, costs more because of this, since modern camping gear loves to price gouge.

If you’re going to pack TP though, just spool what you need around something smaller in diameter (like a skewer). Or if you know what you’re doing then just use leaves instead, those are free.