I have some left over filter bags/socks that are brand new.
They are 7 inches round by 16 inches long and have a plastic ring with built in handles. They are 100 micron and offer much more filtering material then the typical bag due to being thicker.
I have been using these guys for a long time now and they do a GREAT job of cleaning my water!
I can ship them at your cost. Please let me know if you have any questions.
Cost $6 each