FreeLarge stand for 3 kg spools on Universal Auto-Rewind Spool Holder
Thingiverse
7 model
Free
FreeLarge Flange 5 Dollar Spool Holder
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FreeFlashForge Dreamer Large Spool Holder
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FreeReplicator Mini Large Spool Holder
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FreeCreality CR-10 Spool Adapter - Large and Small
Thingiverse
FreeFull-sized-filament-spool holder printable on most 3D printers, small or large
Thingiverse
FreeUniversal Filament Spool Holder REMIX for Ender3 and CR10 (no cutting with 5/16"-18 hardware) and supports spools with large holes
Thingiverse