The model is based on tomark's model from Thingiverse.
You can find the insert here so that the og. creator also gets downloads:
https://www.thingiverse.com/thing:4194162
Alternatively you can use the remixed Roller insert from Stellarshade
https://www.printables.com/model/1356253-prusa-core-one-filament-roller-insert
Please send me a message if it needs changes.
Der Autor hat dieses Modell remixed.
Mounting adapted for Core One