sdstang, what you need is 374251-S2 caged nut (1/4-20). Discontinued from Ford but is a AMK manufactured product (B-12033). They sell a 2 piece bag for $4.00, but unfortunately they have a $30.00 minimum order. I would check with Don (OMS) or one of our on site venders that handle AMK products to see if that is a product they stock. The bolts if needed are 1/4-20x1/2".
You could also check with Don (OMS) or Mike @ Motor City Mustang to see if they might have some used ones since they both have parts cars