I found some baffin's on ebay a few years ago, best cure for my cold whitetail sits.Sometimes I wear wool socks around the house only to get cold feet. I find that the small amount of sweat is evaporating directly from my skin thus cooling them. If I pair them with a sock liner, problem solved.
By wicking away the moisture you eliminate the evaporation which is what cools your skin.
Same thing inside a boot.
Personally I’d save the cash and buy a good boot like the Baffin Apex.
My feet sweat also. One thing that works for me is to spray them down with the aerosol deodorant. This really helps keep my feet dry so they don't get as cold.By chance are your feet sweating? I kept on buying better insulated boots and socks years ago till I realized that my socks were wet from foot sweat. They even sweat in shoes at work.
For my issue I have found that lighter insulated boots and good wool socks to work best for me. I still have to put them on the boot drier at the end of the day but my feet stay warmer now as they don’t sweat as bad.