To help set your mind at ease, aluminum body panels are nothing new. Individual AI panels go back to Model T days. In fact Tudors and Fordors bodies were usually aluminum.
I'd have to see the backside of the hood where that goose egg is. I'm guessing its double walled, and if so, we'll be drinking beer outta that hood in a few months. Either way, with hourly labor rates the way they are and the body shop industry desire for quick job turn-around, replacement hood all the way.
JL1Z-16612-A is the Ford part number. Brand new one on ebay right now, $499 or best offer, with FREE shipping. Search item number 293091838301. Its in Sanna Tone, so should get to you fairly quick.
Unfortunately, most body shops only replace and paint.
Most don't even know how to do the old school body work the old guys used to do daily.
Very sad.
It used to be about the price to do the job...not how many hours it took.
I have seen guys sand on fenders for hours/days to get them perfect but now it's the hourly rate and since most everyone esp insurance wants the best price, its slap a new cheap quality 40-60 fender on it and paint to match.
The only bright side is many of them can REALLY PAINT! They can match it up to where you can't tell it was fixed.