Some sites on sock blocker:

http://pickupsticks.ca/index.php?cPa...vib8va49ja3pm3
http://antiques.search.ebay.com/_Ant...assZladybug007
http://www.needletrax.com/blockers.htm
https://www.yankeepostman.com/prodinfo.asp?number=493

I know the idea is to use these instead of the dryer but you should have a set around just in case.

With a little handy craft, which dos not seem to be in short supply with this group, you can make you own.