I built Ikea lack enclosure for ENDER3 printer. It was necessary to move power supply out of enclosure. For this I designed the holder as depicted.
Additional material:
To hold PS in assembly
2 x metric screw 4x8mm + corresponding washers
To fasten holder on furniture leg
2 x screw 5x20
1 x screw 5x50
To screw two holder parts together
2 x screw 4x20

It was also necessary to lenghten PS cable. Use copper wire with 2mm square cross section for this purpose.