Looking for Diablo 44m filters

Hi all! More non-discussion, technical stuff: I'm starting to work on restoring some of the old Evecon-6 servers that I used to lug to conventions 30 years ago. Right now I just dragged out my Plessy 20mb disk drive which is a Diablo 44 Perkin Elmer monster. Yep, the one with the 10mb platter on the bottom and 10mb removable platter on the top that looks like an RL01 pack but of course is not. First up is powerup, oddly enough it is powering up which is good. Second is the filter: If the filter is plugged the heads will crash, and this filter does not look great. It's a Cambridge Filter Corp CFC 1246159GO which maps to a Perkin Elmer part number of 302709-001 Google isn't helping, anyone know where I can get another filter or how I can clean/purge this one (if possible) Thanks! C