1:6 scale fitness socks or slippers

Hi, I'm currently building the fitness and exam area of Star Trek TOS sickbay in 1:6.

What I need are the blue socks or fitness slippers Kirk is wearing while doing work out. The coulour would be black, too.

You matched the towel under Kirk's head exactly! That's amazing! How'd you do that?

Maybe try searching for 1/6 scale karate outfits. These slippers aren't blue, but the style is close:

https://www.ebay.com/itm/223711897907