My bed sides are pretty beat up and initially I wanted to replace the bed, however here in hawaii I haven't had any luck finding a bed without paying an inflated price for a whole truck. I am now considering fiberglass bed sides. Can I keep my bed stock and add fiberglass bedsides? I want it to be functional, no need for a pre runner set up right now. What is the general method to install them as stock replacements? Any help is appreciated.