No I don't have a DIY on it. The photos in my album provide some info but not a lot. The material is a composite of half wood and half plastic sold at Lowe's and used for siding and trim on houses. It is fabricated with normal wood working tools. I put the smooth side up and mounted it with existing fasteners under the body and painted it with black plasti dip.
No the spoiler in the pics I posted is the Carbon Signal (CS) add-on spoiler. The one on Trips Z is the Mines add-on replica, the original Mines looks the same as the one Trips has.