I found one for the front of the CFS (it's white in the pic), which worked out great. But I wanted more, and the ones that come with the CFS at the bottom are just too inconvenient to change (you need to remove the spools all the time). So, I made this one up for the rear, and I hold it in place with a heavy-duty 3M Dual Lock Reclosable Fastener SJ3560 from Amazon. Worked out great, now I can get the moisture content down to 10% or lower.