Made this hitch helper in about 20 minutes, using unbreakable plastic mirror, about 13' long and 1/8' wood for the sides, and of course duct tape to hold it all together. It also folds flat for easy storage. It works perfect.
Mirror side
Back side
Side shot on topper
On topper (1 pin on top)
Through rear view mirror (Not very clear in photo, but in person VERY CLEAR)