I only have an econline, so something very small, or at least not very deep is what I would like to find. On a budget, but would like something that burns efficiently.
We have a Fatsco Tiny Tot stove, techincally for burning coal and charcoal. We've burned wood in it but it burns very quickly...max of 1 hour. Charcoal burns longer and more evenly. It's not airtight but could be with some work. Uses 3" stove pipe.
There are others. I'm sure a search of the archives would yield lots of info.