I guled two magnets 50mm x 10mm x 3mm (https://www.amazon.de/gp/product/B0B594JFLS) (no affiliate) with superglue in.
Due the curing process I attached additional magnets in the inside that the glued magnets will not move and are tight to the material.
I am using the additional shock absorbing feet at my X1C. This causes a “jumping” printer. Therefore I needed a solution which is attached to the printer and have enough strength to be attached to it.
This solution works very well for me.