I made a remix of https://www.thingiverse.com/thing:3502973 where you can use the original nut from the Ender 3 spool holder.
You also need to print 3 pcs of the Spool_Holder_Dowel_V1.
Enjoy!
Ender3_Spool_holder.stl | 214.7KB | |
Spool_Holder_Dowel_V1.stl | 81.3KB |