Opinion, Repair or replace fender

[nitrosport_5]

Hey guys, i had a driver side fender that needed the lower front corner replaced but i noticed that it was tweaked pretty bad. So i was looking for a replacement fender. Dont want to go aftermarket unless i have to. Was looking atthe fender currently on the truck and i am not sure if i should try and save this one, or find a new one. I am doing a cab/bed swap on this truck in the near future.

Looking at the fender and picking at it, i was suprised to find the front lower corner does not appear to have any filler in it (if you picked around the rest of the truck you would be amazed as well) . This is only picking at it with a pick, dont wanna sand it up just yet. The rear corner looks to only have a skim coat of filer on it. Above the wheel wells there looks to be no filler. The bad on this is the large rust area/hole. Now i do have 2 fenders here i could cut pieces out of and patch this fender. Do you think i should save this one? Or would it be worth the money to buy a new one>