Here is what Kel-Tec sent me in September 2021.
The "new" (gen 2?) version of K-T's replacement pad is smaller, thinner, & less expensive than the "OG" replacement pad. I'll stay with the OG replacement pad.That doesn't look like the optional pad I bought for my KSG years ago.
That pad was wider all the way down.
Whether it's still available, Bullpup Armory lists it with some photos showing the wider and thicker size.
It appears to be even thicker then the one you showed above.