Best quality quarter panel(1971 demon)

Let’s start this off with last fall when I was heading to work and some young kid, that was clearly not paying attention rear ended my car Creasing the rear bumper that was oem. His car was so low and my rear end being higher, he ended up going under the car and damaging the left quarter panel. I noticed half the quarter was bondo and it had cracked pretty good. Brought the car in today for an estimate and they said they probably won’t cover a new quarter. I figured since they have to patch it back up and paint it, I might as well just get them to weld in a panel and that way it won’t cost as much as me getting it done and I’ll actually have some metal behind the quarter instead of 1/4 thick bondo. I have heard AMD has the best quality/price for panels but can’t find 1970-1971 duster/demon quarters. Was there any other companies you guys recommend for panels and a bumper.
https://app.photobucket.com/u/hippo204/p/a512a1ec-a6d7-46cc-a07c-9d8ffd99b079