Nate, I looked just long enough to be thankful mine is in one piece (!) So darned difficult to think of another car that has a fender well where the left foot should go (and also have carpet!). Cutting a corner in the northeast corner of generic material would be close (and look at 8ma516...!)
I started to ask myself whether making a mold would result in something that holds up, I see these referred to as "vinyl" and know to someone the process of making one is trivial...but that is when I fell back to square one (mine is in one piece! Even though there are probably 4 other people who could use one...)--Lee