And I also decided to buy a pendant, and "Oz pendant" came to mind first and foremost. (I need help!)
So, I looked up "Wizard Oz pendant" on eBay, and found a listing for various book-based pendants using game tiles as a base. I decided to get one of Ozma flying through the sky on an Oz seal from The Lost Princess of Oz. It came today and I'm wearing it now.
I rather like it, and the seller did a good job! If you're looking to accessorize Oz-wise, take a look!