You would think that someone out there would have an extra hood laying around. I have spare Dodge, Chrysler, and Imperial hoods for 1966, but sadly no Plymouths.
I checked Car-Part.com, and the closest one to you looks to be in Cartersville, GA. It's a decent haul from Virginia, but could be worth it in the end if it's a real nice hood. Bodywork on hoods is bad news. Between the flexing and the engine heat, repairs involving body filler don't hold up very well. I know you asked some time ago if '65 and '66 is the same, and I think the answer is yes. The salvage yards are listing them as the same, and that would go off of the Hollander Interchange numbers. I looked it up in the Chrysler parts books and they show a different part number '65 vs. '66, but that could be due to a supersession. The hood in Connecticut is also on ebay, and it's very rusty on the underside and way overpriced. There are two in Arizona not seen in my screen shot, but shipping could be an issue.
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Jeff