My makerspace salvaged an HP Designjet 500 plotter that came with no accessories.
Ordering a 24" roll of paper to test it with, we needed some way of feeding the roll into the printer.
You'll need two of these per roll, and a suitable bar to go through the middle.
The inner diameter is 10mm, and a bit of a tight push.
If you need a different diameter, leave a comment and I'll see how large I can go.
Printed in PLA with the default 0.3mm DRAFT profile with the following tweaks;
The author hasn't provided the model origin yet.