AVON makes a bias ply road race slick that is 20" in 14. they also make a 19.5 in 13.
http://www.avonmotorsport.com/motors...rossply-slicks
I have a source for 13" takeoffs. check your local scca formula ford racers, ask for a set that aren't corded. should last all season with your escort.
nice work in columbus....