Contacted Customer Service through e-mail and got a quick response. Ordering was easy through website.
Pad/media (rigid media) for: cp35 (2 x 8
Pad/media (rigid media) for: cp35 (2 x 8 3/4 x 14 3/4) wf8al
Buy this part and as many parts as you like and pay only $9.99 shipping, within the Contiguous United States.