Some fire fighters use carbon fiber air tanks so it's possible. I had a chance to see the aftermath pictures of what happens when someone puts 4400 psi into a 2200 psi tank but that's another story for another day.
I'd be concerned about the stability but I sure there’s work around for that like the legs Jetboil uses for their canisters.
My first thought when I read the OP was what's the point? If you want to save that much weight, use Esbit or Alky. Then I considered all of the fires and stove restrictions where you can only use canister stoves. I think that this would be a niche market and it would be hard to justify production for the lunatic fringe of backpacking but who knows?
If you aren't subjected to stove restrictions, I'd strongly consider an Esbit or alky stove to lighten up. My light trail solid fuel kit with enough fuel for a week, spoon, lighter, etc comes in under 8 oz and my TD with Evernew 600 pot isn't much more than that.