Just an Idea for you.
I sourced mine off e bay and bought an old Classic Leather Luggage Strap as I wanted the "patina" to show.
Cost £20 delivered and with a cut in the appropriate place it made up to suit my car.
I used black ( self stick) velcro ( the soft part) on the rear to stop it leaving register marks on the paint work ( cost £2)
Job done.
Good Luck
