Missy Leverette

I sure hope that I am putting this question on the right thread. Has anyone heard of or seen a pre fab barrel for the rocket ovens?  I know that I have seen someone selling them but I can no longer find it.

Thanks!

Hello big perms,
I am really hoping someone can help! My 12 y/o son will be building a rocket oven and wants to double it for use in some cool science fair experiment. Got any ideas that would make for an intriguing measurable experiment?
Anything would help.
Thanks!