The Club Manufacturing Fund has the HJ fuel tank in the works. It will be made of the same material as the 1951-55 Kaiser version and will be the correct size for judging purposes and for proper SAFE installation in cars. Adam Harder, who is in charge of the remanufacturing program can give people more information.
I have already advised him of my intent to purchase one as a spare for the 1952 Henry J that Barbara & I have.