I am looking for the black rubber/plastic inserts (5) that fit the rub rails for a 86 Fox body rear deck luggage rack. four are 12¾" and one is 9¾". The cross section is approx. 1/2" wide by 9/16" high at the center. This material may be precut in a kit, or sold by the foot off a roll. Either is acceptable. Thanks for your help. RHS1144