please help me

alright guys...i really need some help...
i need to find a box or bed sides or replacement panels...i dont really care i just need to ditch some rust and dont want to deal with it comin back...i dont care were it is or how i got to get it im getting desperate...if someone has something or knows were i can get one please help....id appreciate the hell out of it...thanks

my bad.,.. the truck is a 81 luv....
so 81-81 luv-pup