All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
I wouldn't. When you replace the rockers you usually end up having to replace part of the floor and inner rocker and cab corner etc... In order to get good body lines you have to clamp and manipulate the panels. Welding, shifting, tweaking etc to get the desired finish. I think panel bond is great for replacing skins but I wouldn't for something like that.