1972 blazer k5

just bought this and Im restoring it. I have a question for anyone who knows anything about doing body work on these older trucks. around the windsheild its pretty rotted and rusted. Down the inside of the doorframes its bad too. It will probably need to be replaced. do they sell these parts anywhere or will i have to make them out of sheet metal or cut them off another car...or somthing of that nature.

Any suggestions or comments are welcome as long as you know what your talking about. Remember this trucks old its not like one of these 90's ones i see everyone posting about.

you could try LMCTRUCK.COM they sell alot of remanufactured products for blazers