If you don't want to have a threaded roll with nuts - you can print a smooth one.

The 300mm x 120mm should fit up to 3kg spool.

The 200mm x 100mm should fit up to 1kg spool.

Print instructions

No support is needed.

Material used: PETG

The stand can be printed using a bigger layer height like 0.35, for the rest I would suggest using 0.2.

Parts needed:

1. 1x stand
2. 1x roll
3. 2x nuts (if treated roll chosen)
4. 1x filament guide

BOM:

1. 2x 508zz bearing.
2. 2x socket button screw M8 x 45mm
3. 1x PC4-M6 bowden connector (optional filament guide)
4. 2x M3 heat insert (optional filament guide)
5. 2x M3 hex socket screw M6 x 6mm (optional filament guide)