I bought some thick wool socks from amazon, you might have some luck there.
Also, mfa often recommends these:
Forget about your worries and your strifes! Been forever since I saw that... I always need socks - gotta take care of your feet or they won't take care of you.
If you're looking for wool socks specifically, the CostCo wool socks are recommended a lot—good quality for the price
these are the ones right?