I wore my Air Force issue pair for years until I wore them out. I wish I still had them. I’ve seen some cheap knock-offs at faux “military surplus” stores, but I haven’t seen the real thing for years.
Right after I posted I checked eBay and Amazon.
Just the cheap stuff you mentioned.
And nothing in my size (14EEEE).
I was lucky.
When I went through the Replacement Station I got the only pair of “Extra Wide” they had.
The Supply Sgt told me to take good care of them because the chances of getting another pair in country were pretty close to zero.