I made my own. It took a while but they turned out pretty good. I spent about $22 US on the material and then cut it to fit. I used a paint pen to mark the holes as I laid it in. Then I punched an awl through and then opened up the holes with a die grinder with a burr bit in it. I built it in 3 pieces, which overlay each other, so it would lay perfectly flat. I made it so I have to remove the brake and clutch pedals to fully pull the mat out, but a couple short slots would fix that if a guy didn’t want to. I have about 6” of overlap on the pieces. To help anchor the mat, I put flat washers on the rubber over top of the studs for the old “sound deadener/floor mat” and secured it with a tight fitting E clip.
Time consuming to make? Yes. Would I do it again? Yes, and I will be on the next AD.
https://photos.app.goo.gl/2Ei4tNp2WRGyyGyc8