Buy the roll. You can make the pieces fit closer/tighter together, & not as short on the ends like the factory stuff. You will have to cut the leading edges on the front of the doors on an angle, so that it doesn't catch the fender when you open the door.
This is how I did mine. Didn't completely follow the body line as it has a curve to it. Snapped a chalk line from the bottom of the rear of the front wheelwell molding, to the rear of the rear wheel well molding, & continuied back to line it up with the molding on the rear bumper. (Yea, my rear bumper needs to be aligned!)
From back to front.
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