You could try this one being offered by Melvin's Classic Ford Parts: http://www.parts123.com/parts123/yb...~S4C315FWG950160279450k~Z5Z5Z5~Z5Z5Z50001018o
I modified a LoKar cable to make it fit my Comet. If you can get an OEM style cable that will fit, do it! Far less work.
Be aware that 70-72 is one style .... easiest way to tell is there is only one screw in the bracket that bolts to the firewall. 1973- up is an improved design, but the throttle pedal is different, because of the way the cable connects to it. That one uses two screws at the firewall. A lot of the early ones break where they attach to the pedal.
That's what happened to mine. I found one today but it was the later style in bad shape. I think I might modify a 1985 mustang cable.