What is a good source for the twist off spinners for the 1988 Lincoln Town Car with the all-spoke rims? Have put on 6,..and they keep getting stolen, even when bolted on! Never happens at home, always when parked at work or shopping. Have tried junkyards, and they are always poor condition. Am almost ready to buy different rims and just use hubcaps,..this is absurd. They cannot be valuable! If I can't find any,..will make my own out of Aluminum and permanently affix them!<P>RS