Came home from work to find that the wheel center crests I ordered on ebay from China (ebay seller neuepulse) had arrived. They are gorgeous! I installed them on my spare set of center caps and will swap them for the ones that are on the car now (will keep the other ones as spares).
They cost just $58.95 ($13.99 each plus $2.99 shipping) for all four!
They came with double sided foam tape on the back to attach to the wheel centers, but I decided to remove the tape and use adhesive instead. I originally intended to use black silicone adhesive/sealant but in the end I went with Loctite premium Urethane adhesive. I used cut down cotton swabs stuffed into the holes to keep the adhesive out. They also helped center the badge. Worked great. I'll use a dab of black silicone adhesive/sealant on each of the retaining prongs when I install the caps on the wheels (it keeps them from rattling)...
These look so good I will probably order another set!