I ran out of base coat paint to finish my front bumper late Friday afternoon so I had time and the cover off till Monday at least. Used some thin wall PVC pipe from Lowes that is PE coated on the inside. I scuffed up the outside with 46 grit sandpaper and shoved it in the hole. I used duct tape to hold the right position till it cured. A little rough in and some paint and I will figure out how to finish the connections after I read your advice.