This is a remix of https://www.thingiverse.com/thing:3316671, which is a remix of https://www.thingiverse.com/thing:2913473
I like the small "islands" added by jorge_rui for silicon buttons to help on the dampening.
But it misses those extra support bars the original has.
So I added support bars on the part B so that the final thing fits around the rubber feet already present under the  Ender 3 Pro.
Not sure if this also fits on the non-Pro  Ender 3.
Just print out 4 of part A and 4 of part B. Assemble them and place them under the dampening rubbers.