Try your local parts dealier, NAPA, Advance Auto Parts, Pep Boys etc. They sometimes have them on sale. $106.00 for two of them is a pretty good deal.
My first car was a 67 Mustang Coupe, 2nd one was a 67 Cougar XR-7, 3rd one was a 66 Mustang Coupe. Why did I get rid of these cars for ? I know why, because I'm stupid, stupid, stupid.
My next Ford.....