Cover for AC Condensing Unit

Hi,

I have new HVAC in my home. It includes a new outside
(Condensing) Unit. The old one rusted to hell-and-gone
due to exposure to sun, etc.

I'd like to build/make a cover to protect it from the
elements in the off-season (winter).

Unit is about 25 x 27 " (rectangular top), about 24 " hi.
Would be nice if covered to bottom, but I'd settle for
a cover over the top 12 " of the unit.

I am drawing a blank on what materials to use.

Anybody invented/tested this wheel?

Thanks,
Puddin'