Just a tip: I was told that old pantyhose would work just as well and are a great use for those with runs or holes that we would normally just throw away...
Also, you might be able to purchase really CHEAP hose or knee-highs cheaper than the scum socks.
I'm about to go through my sock drawer because I KNOW I have some old hose in there that would work!
I'll let you know how they do...