Recommendation for a US sock manufacturer?

I am looking for a sock manufacturer that can produce non-slip grippy socks. Unfortunately, everyone that I have tried to contact so far either does not have that capability or they will not return a phone call or email.

My target audience is demanding a US-made product, so I am trying to accommodate that.

I have a tech pack and a physical prototype, I just need to find someone who can make it.

Any recommendations?