A tour of my Mk1 galley box, originally designed for the Trangia spirit stove. This is used in my GP14 sailing dinghy and also in my tent when camping. I used hardwood 12mm plywood (Not marine grade) and it had 2 coats of epoxy and 4 coats of varnish.
There are many stove options, more info about Trangia can be found here https://trangia.se/en/
The gas conversion kits can be found via an internet search.