The Belleville washer shown isn't deep enough to accommodate the bevel on the screw head. The ones that I have acquired are exactly the same as the mangled one that Randy shows. I got them from ToPeCo Products, 2525 Southport Way, Suite H. National City, Ca 91950 800-266-9314.
Managers email is
wade@topecoproducts.com. As I stated before I took a sample from my door panel and he supplied the right one. There are several different sizes. Got the part number at the time but misplaced it. This establishment is about 10 minutes from my house and I will go tomorrow and get the manufacture information and part number and post it. I looked everywhere before I remembered getting other fasteners from them in the past. If as a said you would like me to pick some up for you let me know. I would be more than happy to do so. And put them in the mail tomorrow. You would no doubt have them by Wed. or Thurs. I think that this is strictly an automotive product. The manager may not recognize it by description because of the number of fasteners they stock. Will take one of mine to show him. Using the washers so as not to damage the upholstery on my new door panels.