Does anyone have a source for truly non-binding, no cotton, no elastic boot socks?

Circulation in my feet is poor, partly from some damage years ago, and the slightest constriction tends to make my feet cold, from constricted blood circulation. I bought some diabetic boot socks a few years ago in the largest size they made. They are good but wearing out and I cannot find them online now.

The best I ever had were Icelandic wool, thick and apparently hand knitted with zero elastic that fit loosely and superbly and were wonderfully warm. They were a gift and I’ve never known their source. All of my boot socks now have elastic cut at the top and snips all through the sock to reduce the constriction, including some fine Merino wool ones.

Perhaps it is my imagination but socks seem to have more and stronger elastic than most did 20-30 years ago.