I got hardware in the spring. Napa has packages of 8 mounting clips for 7 bucks. Part # 665-1141. They have a 10-24 thread. They also had the nuts which I did not buy from them as they did not have the rubber seal. I did find the nuts with seal from Altha Fastener in Florida. The item # is 140561376363. Package of 25 for 7.50 and they only charged 3 bucks to ship to me in Canada. You could probably get everything from Altha however I had already bought the clips from Napa.