PDR on Old Metal?
I agree with everything junkyardhero said. I've been doing PDR at a Lexus dealership for over 20 years and 30 years total. Every dealer has a PDR guy, but I would stick to the high line dealers. Also detail companies and body shops would be good places for leads.
Access to the back of the dent is going to be the key on that repair. In front of the gas cap is probably gonna require removing the LR arm rest/door card to get access. If it was behind the gas cap you have easy access through the trunk.
Find a good PDR tech and ask for references or pics of previous repairs. Most of us keep some pics on our phones of past accomplishments.