Make one Rich, you know you want to.
All you need to do is find a stainless flask thats pretty light, buy some cobalt drill bits, take 2 days off work and figure out how to double skin the thing with a 4-8mm gap-easy!
I don't mind guiding you re hole sizes, places etc.
It's a good feeling making a stove that is as good as anything on the market.
An easier and eminently more packable stove to make is the nimblewill nomad stove, but its no Bushbuddy.