Parts needed - 345 Spare Tire Cover on rear, et.al.

[audiv8q]

Greetings!

My wife and I are buying a (I think) 1985 345 in very nice condition. It isn't "mint", but pretty close.

I will be looking for a couple of replacement parts (used, I hope):

1) The spare tire door/cover on the rear is missing. I have been searching the net for one, but haven't even seen mention of one such, let alone one for sale...

2) The shroud for the rear rooftop AC is missing. The AC is there, but the plastic/fiberglass/acrylic (whatever) cover/surround/shroud is missing. Seems this ought to be a "standard part" for AC units, not necessarily Airstream specific.

3) The backup camera TV monitor is missing. Also seems "not Airstream specific" - and I am told that the camera itself does not give "good pictures," mostly just because it's old technology. Perhaps I just ought to replace the cam and monitor all together?

It would be nice to use the monitor to combine the backup camera with the ability to use the monitor as a GPS display unit. Is this possible? I am thinking of using a small flat-panel monitor (computer monitor?) as the backup monitor, and finding a way to channel the image from the Garmin Nüvi to the monitor for better visibility with a larger image.

Does anyone have any know-how on this?