There were several different versions of the rubber splash shields over the years. BUT they all had to fit the stamped-in area of the inner fender stampings. Inside the raised ridge on the top of the openning, with the little holes being where the wire retaining clips held the rubber pieces to the fender skirt. That part is "in stone".
Past that, there were general lengths, but the bottoms could be variable. Usually, the center part laid over the upper shock absorber mounting, with slots so as the upper control arm moved, the center part and outer sections did not move themselves (i.e., clearance slots).
The rubber itself is classified as "masticated rubber" sheet. Die cut. In some years and applications, they could have a silver, textured Mylar layer on the engine side of things, for heat resistance. When I was ordering them for my '70 Monaco back in the later 1970s, they all seemed to come in rolled up rather than flat and did not exactly match what was on the car, other than where they attached. "Something is better than nothing".
The MAIN ID areas would be the dimensions where the rubber attaches to the inner fender stamping. Right and left sides are specific. NOT the same as B-body or non-C-Body cars.
Thin, masticated rubber is available on the open market. You can make an attaching template out of cardboard and cut your own with a very sharp knife, I suspect. There can be some random pictures in the Chrysler Factory Service Manual and in the illustrated parts section of the Chrysler Parts Manual (in views which show either the front suspension or front body sheetmetal).
Sorry, can't recall the particular vendors, but I have seen them, with basic dimensions.
Enjoy!
CBODY67
