IKEA SAMLA spool holder specifically designed for regular 32mm diameter PVC pipe.

I suggest printing it vertically and in PETG (will probably have a lot of stringing), ABS or ASA.

I printed it in some cheap ABS and it is holding up quite well.

I used a piece of pipe that was exactly 31cm long.

To keep the holders from falling in I used double-sided tape (the thicker type with foam) in full length of the contact surface.