I liked the original, but I would get some spools that would fall off the spindle. Or the spool would not sit squarely on the spindle. This remix solved those problems for me.
Print 1x Filament Holder
Print 2x Filament Cap
Recommend ABS or PETG or other high temp filament.
Same hardware as original, bearing is press fit.
Press bearing halves onto filament holder and filament cap.
Connect filament holder to dehydrator using hardware.
Place filament cap with bearing on holder, ensure smooth rotation.
Place spool on first cap.
Place second filament cap, inverted, on spool.
Filament Holder: https://a360.co/2lWwA7z
Filament Cap: https://a360.co/2IPzxzJ