@Mikey P
I am not sure if this will work on your truck, but while I was at the open house for the people who did my wrap, I saw this where they wrapped over a side bumper....it might work for a different color of course rather than black...but just giving ideas...or potential ones...
Not sure what material you side panel is there, but with snowmobiles, we used to make the graphics stick on certain vinyl belly pans by just running a torch over them quick to take off the glazing...but was thinking of you when made this video too...
And...my install guy has some really mad skills you will see in this video. Better than some 2 tone paint jobs I have seen! The grey in the pics is the actual car and paint...and the blue is the vinyl....he trimmed it while on the car with special way...