when I started looking into replacement mats for my truck, I hit proverbial roadblocks at every turn - those "Holley" floor mats must be a recent offering, becasue when I ordered ACC mats, that wasn't an option.
Now, my truck has had from day #1 (as far as I can remember) carpeted mats;
It's possible that they were GM accessory parts that my grandfather had included with the truck when he got it - but as far as I can remember it always had carpet mats.
In the last couple years, I have found a couple sets of the rubber mats (the local climate allows this stuff to survive pretty well compared to other areas);
The ACC mats were a bit generic, and didn't fit quite right - especially considering the heft asking price.
There's my two cent's worth.
HERE is a link to the images of the ACC replacement carpeted mats.