I've tried at least ten printed filament clips and this is still the best solution : r/3Dprinting
a) Filament monitor parts: 1-the disc with holes attached to the spool... | Download Scientific Diagram
1.75mm Filament Clip by walter - Thingiverse
Amazon.com: 3D Printer Filament Spool Holder Bearing Design Fits All Spools of Any Size and All Filament Types for PLA/ABS/TPU/Other 3D Printing Materials with Ender 3 Glass Bed Spring Turn Clips :
Filament clip / universal filament clip 3d model for 3d printers free
3D Printable 1.75mm "DAS FILAMENT" Filament Clip by Manuel
3D Printable Filament Clip 1.75mm for 3DFillies by Jayman Eckhardt
3D Printed Filament Clip by Wrenzo | Pinshape
Filament Spool Clip free 3D model 3D printable | CGTrader
Filament Spool Clip 1,75mm by vladaz320 - Thingiverse