Gas tank Sealer?

anyone know where to by some sort of sealer for a gas tank in a truck that was filthy as f and slight rust in it that is now cleaned out. I see it at a bunch of stores online, just wondering if there is anywhere local. i Checked the ussual local suspects like autozone, advance, napa and valley auto parts but no luck. someone suggested a motorcycle shop. Anybody?

call moyer’s in greensburg
they will seal it
tractor supply used to sell the tank sealer before.
other than that i used ot buy it through motorcycle parts suppliers

x2, check with any place the cleans and seals motorcycle tanks, i’ve seen countless threads on the bike forum i frequent about a few of the places that the guys had experience with doing 4 wheel’d vehicle tanks also

thanks guys. you think bentley’s or mosites might have this crap?