They were the original microfibre socks, so you should be able to get them in a range of colours now! If you google "microfibre socks" it comes up with a number of sites.
I found a pair on ebay with gloves they are insulated really great socks to keep your feet warm !
I coach so i am on the Ice for a long time and we do not move around as much a s the skaters But when i was young I got some and they wore out and then I could not find another pair. if you get cold feet these are the fix!!