Rotationally molded fuel tanks

I'd like to introduce myself, as a soon-to-be builder of a mod. 7 S.S. taildragger. I scratch-built an award winning Thorp T-18, which I test flew 19 years & 1100 flying hours ago. I'll keep it, along with the Kitfox, which I've been dreaming about for a few years. I have some slight concern, perhaps unfounded, about fiberglass fuel tanks. Has anyone gotten serious about the possibility of having rotationally molded tanks made? I hope I haven't missed something, but I haven't seen this discussed for the main tanks.

Thanks,

John Evens N71JE
Arvada, CO

I have not heard of roto molded tanks though if Kayaks are any measure they would be quite a bit heavier than fiberglass. If fuel compatibility is at the root of your concern the new tanks being provided by KF are ethanol resistant and should work fine.