Here is an Ebay auction for an NOS C5ZZ 6540544 B rear lower valance by Ebay member "myfordtoys [URL:https://www.ebay.com/usr/myfordtoys?_trksid=p2047675.l2559]" with a starting bid of $199.95: C5ZZ-6540544-B NOS FORD 1965 1966 MUSTANG OR SHELBY REAR VALANCE, NEW IN ORIGINAL FORD PACKAGING. Shipping only to the lower 48 states. No warranty. https://www.ebay.com/itm/C5ZZ-6540544-B-NOS-FORD-1965-1966-MUSTANG-SHELBY-REAR-VALANCE-NEW/362910316777?hash=item547f23f8e9:g:b2UAAOSww~VeLaIP -Fred-