Gary 95 Z28 M6

First off I'm not sure if this is in the right forum. Second, its not really F-body related, but the wheels I'm talking about are. I have a problem with my winter beater. I have an 86 Caprice 2 door that I put 80s camaro wheels on. Well the caprices stock wheel stud is 7/16" and the stock camaro wheels are 12mm. I went to summit last weekend and bought a lug nut kit for the stock studs. The new lug nuts don't contact the taper on the wheels enough for my liking so I want to get other ones, but I can't find them anywhere. What I need is a 7/16" lug nut that has a big "acorn" that will contact the wheel taper enough. I don't want to waste the time and money on new studs either. Thanks for any help!