After five weeks, the heel pad for my driver's floor mat finally showed up from Germany. Celebration time!
So with that, I disemboweled the remnants of the original heel pad, which was hard and disintegrating from age:
Gave the carpet a decent clean and shampoo:
Heel pad installed and stitched in:
And finished. This was the final piece of the puzzle to get my interior back into a state I'm happy with. Worth the time and effort for sure:
Here's a lovely old and new shot of the pads before surgery: