It's not that we don't want to help, it's just that this will be a tough piece to find. Unless someone has scrapped a badly damaged
Bigfoot of this style, and kept a good fender skirt from it, I really can't think of why one would be available. At some point in the past
Bigfoot would have had them available to buy as replacement parts, but that style ended production long ago, and the company has even gone bankrupt (and been restarted) since.
I hope someone has a more useful idea...