Or save yourself the time and effort and bring it to an auto upholstery shop. For anywhere between $100-150, they'll do it professionally- meaning it'll only need to be done once and your door panels will never sag again. Do it at home and you're nearly guaranteed that it'll be temporary fix.
My 2 cents. Your $$ though.
Good luck.
Lee
My 2 cents. Your $$ though.
Good luck.
Lee