I'd like to actually make a replica, but am having a hard time finding drawings
When I was in High School I bought a book from Paladin Press about building home-made flame throwers (I guess I havent changed much

).
I got about half way through it and realized I was 15 and there was a slight possibility I would put myself in orbit. Plus my mom was super
un-cool and did'nt like the idea of me making napalm in the garage
Not sure if I still have that book back home or if mom threw it out with my GI Joes and clippings from the lingerie section of the JC Penny catalog
If I remember correctly there are commercial "versions" available (burning brush I guess?) not sure from who/where.
Good luck!