PPS CF sounds like a decent canditate for this application, I have no experience with it yet but from what I've heard from annex and voron folks it is not that hard to print in an enclosed printer, somewhat comparable to PC Blends, so it's doable. Also it should perform way better than most nylons when it comes to creeping. https://www.3d4makers.com/products/luvocom-3f-pps-cf-9938-bk-filament
3D4Makers.com | 3D Printing Filament
Luvocom® 3F PPS CF 9938 BK Filament is a Polyphenylene sulfide, linear with 15% added carbon fibers, and is known for it's heat and chemical resistance. Below 200 °C the material doesn't dissolve in any solvent. This particular high performance polymer grade is tailored made for the 3D printing industry.