This is my second attempt at this and is much better than the first. It is 100% printed; takes about 2 hours per bearing and fits over the metal bracket that comes with the Mono Price Mini. You will need 2 of these one on the inside and one on the outside of the spool. It will mate to a standard spool of material. There is some variation in the spools diameters, so you might have to add a piece of tape to make everything fit snug.
I can now print overnight with this dispense without worry of jamming.