Was just on the same search - found that my TX with the fancy custom "carbon fiber" paint job was not even mildly fuel proof, so needed something that was. Overcoating with Krylon clear did nothing to improve it.
Lusterkote is gone...except perhaps a few cans of white knocking around.
Only alternatives seem to be Klass Kote or this one, which used to be what Nelson Hobbies sold:
https://www.systemthree.com/ But shipping for the small 4oz containers is as much as the paint!
Likely you can still find good old dope around, also.
I won one of these at a club raffle, that allows you to turn any paint into a "rattle can" equivalent:
https://preval.com/diy-pro-products/preval-sprayer/
Mine is still in the box, so no idea how well or poorly it works.
I settled on Rust-Oleum engine paint in the can - not the super high heat version, but the one that is supposed to be gasoline proof. But that seems to be only available in red or black. Fingers crossed that it works.