EDIT: Spoken for and will be in the mail soon. Thanks TW community!
Maybe my garage cleaning can benefit you! I have two wheel center caps that are leftovers from a previous truck that I sold. I know the caps fit the style of wheel shown in the second photo. They may fit others, too.
Price: Free! (just pay shipping -- about $6 for priority mail to the lower 48).
Surely someone is looking for this.
Remember, these are just the two caps, not the wheels. And not my old truck.
PM if interested.