Never done it, but my first thought goes to using the existing plexi door and mount the units in it. If the units have the right dimensions, and you place them just so, you'd still be able to store items behind them and open/close the door. Next I would ponder replacing the door with a piece of starboard, but depending on the hinge setup, that might also entail replacing the hinges or working/routing the starboard to have the existing hinges fit.