Prusa Bear toolbox (bear? here: https://github.com/gregsaun/prusa_i3_bear_upgrade) . Works with 20mm V-slots, doesn't really make use of the V-slot interface but has a snug fit. See pictures.
For the other side mirror in your slicer. And use supports to print!
To mount: backside first then tilt the front down
To unmount: pull front side up, backside will follow