Grab a short piece of flat stock, measure the distance between the staple holes on your inner fender wells and transfer those marks to the flat stock.
Grind two 6-32 screws to a very sharp point - use screws about one inch long. Drill two holes in the flat stock where you earlier transferred the measurement. Then insert the screws through those holes. The holes should be pretty tight. Secure the screws with a nut on each side of the flat stock. Make sure the screws stick through the same amount.
You're going to whack the screws/flat stock with a hammer (softly) to dimple the inner fender wells. That will give you a place to drill and will keep the bit from wandering. Test the unit on a piece of scrap steel first to make sure you have the spacing correct. If its a smidge off just slightly enlarge one or both holes and push the bolts to the proper place and re-tighten the nuts.
Works great. I get a cut if anyone patents this thing.
