That area is work hardened way too much... You are going to have a hell of a time DIY'ing it. If you have a buddy with a morganokker then you MIGHT stand a chance! Its such a tight area that its hard to work...
You will be better off doing a panel replacement! No sense in wastign your money to fix it when you should be using it to buy a panel!
If you buy a panel and have the tools, lets us know, we could help walk you through!
I would cut it out a bit higher than the body line, go to a scrap yard cut out a good donor piece if can find one, and weld her in thats too much warpage to fix w/o cuttin and welding IMO
This is providing ya have a cordless saw and welder, and cut more off the donor than ya need, you can always trim later
Nice find on ebay, i might pick that up.. I would go the bone yard, but no joke, every mazda xcab has the same dent, there are atleast 4 at the nearest junk yard, all with the same dent.. lol thanks again