Based on the Door-magnet-A printable part for the Original Prusa Enclosure, making use of the idea for an sloped slot which can hold the standard magnet used for the Prusa MK2.5/S, MK3/S/+, and MK4.
The STL is provided - but it's best printed face-down on the multi-tool XL or Prusa MMU.
The set of 8 spare magnets (20x6x2mm) can be purchased on Prusa's eshop (https://www.prusa3d.com/product/set-of-magnets-8pcs/).
The author remixed this model.