air vent cable

I was working on the right vent knob on my 57 it was stuck and I was tring to free it up
I followed the cable to the vent flapper. I noticed that the cable hold down bracket was missing--- the part that holds the cable while the wire inside moves back and forth-- It looks like it was attached with a screw.--- does anyone know where I can get one?? i've looked in some parts catalogs but not sure what it is called so can't find anything

The Concours Parts catalog doesn't seem to show the clip, but Casco shows it as "heater control cable retaining clip" their part #18548-C at $1.60. The problem is they have a minimum shipping rate of $10.00!! Try your local Lowes, Home Depot or Ace Hardware, one of them must have a suitable replacement.

Gary.