A few years ago, I was in the middle of restoring the heater/blower system for my 70.  All of the foam gaskets were shot, so I made tracings and used them to fabricate replacements from foam sheet.  My approach involved making paper cut-outs that I could glue to the foam sheet and then use as a guide for cutting out the shapes and punching the holes.   I didn't want to risk malking a mistake with my original tracings, so I scanned them into .pdf files and then used those to print out the pieces