This is a simple filament guide for enders that upgraded to Kevinakasam's Belted Z mod. It uses a Mr148zz 8mm / 14mm / 4mm bearing, 12mm M3 bolts, and some other bolts of your choosing/availability to attach it to the upper frame of the ender.
You can use it without the bearing and it should also work, but the bearing is just to ensure minimal friction.
I printed this on my Ender 3 V2 Neo, should be compatible with other Enders.