Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4571619.

So, I love the (Universal Auto Rewind Spool Holder)[https://www.thingiverse.com/thing:3338467]. And the "spool nut" it comes with fits my rolls of Prusament perfectly. Unfortunately, it doesn't fit my other brand of filament I use often, it's too small, so I created a parametric Fusion 360 file for other spools as I come across them.

The one I'm providing here is for 55mm inner diameter spools, which seems pretty common.

But, if you'd rather make a different size, I've added the design as a STEP file herein.