Both port and starboard lockers looked identical, so I measured only the starboard side.
The locker opening is 61x51 while the height of the locker is about 37cm. See photos for details.
To me it looks like you could fit the compressor in the same direction as I demonstrated my companionway washboard measuring 57x87 if you just could somehow reduce the height of the unit. Any removable height-adjusting legs? Rotating the compressor so that W<->H is not on option due to oil sump?
The distance from "rear slope" (nuts on last pic) of the locker to front edge was bang-on 76cm, so this dimension should fit.
BR,
Tommi