Bump. This tank is/was included in this Forum parts listing: NOS Cougar / FoMoCo MIsc Parts - #6 by katnip302
$150 in-person pick up. Or, $175 with insured shipping included; (USA-48).
Photo link: https://drive.google.com/drive/u/0/folders/1y2AMRVIj-kC8qL-2XpvqeR4vYFYj5HdW
Thank you.