Well Fred - you are most likely right about the wheels. I have been trying to locate any vendor out there who might have them in a 15X6 and nobody will fess up so far, to ever even having seen one. Bruce, in his earlier post on this topic suggested clips that he had, and he very graciously sent me very detailed pictures of them to look at. As I looked I could tell they would not work - so I will have to keep looking. Clearly those wheels were common to any car or truck that came with those hubcaps wouldn't you think? I'm ready to try junkyards ---, unless somebody has sourcing suggestions other than the usual suspects I've already tried. . Thanks again, everybody, for all the help!
Dale