My old standby, Sierra Trading Post, seems to have more of the Bridgedale Blaxnit Garland over-the-knee WOOL soccer socks...they have what appears to be a middle neutral grey...the size is M(edium) so it is supposed to fit only up to a men's US size 9 1/2.

I just ordered two pair and with shipping it came out to just over $20. These are marked as "seconds"...I already have about a half a dozen pair in light olive and dark olive and so far have not noticed any visible defects..."your mileage may vary", as they say...

...so if they look right, I'd go ahead and try a pair or two...on me I can ususally turn the tops over 3 or four times to get a nice cuff just below my knee, so they're plenty long (I'm like 5'11"). I'm sure that you'll end up finding them useful even if the grey isn't exactly what you need.

Best

AA

ps: be sure that they're the over the knee soccer socks...they also have "lowland" socks that are mid calf.