Dave, I think I managed to scare up one of the last pairs of Stohlquist Water Moccasins in the country this spring. I love them, though they're not much good for walking over rocks. Still, if you Google "dive boots (or booties or shoes or socks)" and kevlar, you should be able to find a similar product at a dive shop--neoprene booties with kevlar soles.
Here's a pair I found with a quick search that seem very like the Stohlquists:
https://torelliusa.com/index.php/torelli-kevlar-boots-socks.html
For warmer paddling, I love my Astral Loyak Acs, and find their soles very minimal.
Cheers.