Hi I have a Whelen inner edge that I want to install on my rear head liner. I was wondering what the best way to install this light would be. I do not have the proper mounting kit for this and I dont have time to purchase the hardware from whelen. Basically it says to used a molly jack nut to secure the light to the rear head liner. Anyone have any suggestions because I went to home depot and they don't have molly jack nuts.