@icanfixall, The thin plate is the piece that I need. Someone posted an ebay link in this thread that appears to be the later wheel that requires the spacer. I do remember reading about that spacer being a rare and desirable item. I'll stay away from that expense if I can.
@Cincinnati Guy, Thanks for helping a guy out. I do appreciate the effort.
@Kb1jid, Thanks for the ebay link.
@91idi, Thanks for digging.
This is for my sons truck and all help is much appreciated. Certainly I am not the first to say this, but this OB forum is the best!