possible NAV donor

[Google44]

Hi

I've got a chance to take NAV unit and replace may basic MID with single CD just above it. Beside the LCD display unit what else do I need to take from donor vehicle and where is it located? Is it likely that I would have all the wiring or would I need that too?

My MID has problem with pixels. I may keep it in and replace the CD with standard stereo with AUX etc. I've got one but not sure if it can be done. Had a look at wiring and looks possible as antenna would be powered from my new head unit and everything should work. Could not find a fascia that does not include the MID but only the replacement single DIN head unit. MID would be then only for trip computer usage.