Changed the Womboat from what we call Metho (alcohol ?) to LPG as soon as the new stove
could be delivered and installed.
Down here in larger population centres you'll usually find that bottle swap centres are the go. Bit of a pain cos the quality of the bottles themselves varies enormously. Camping retail outlets and some marinas still fill you old bottle for you.
I believe you can buy adaptors to suit different valves.