Those of you with access to a 3D printer can now print your own Shelby Lancer center caps.
I have it really close to the original and have improved the retainer.
Some sanding, filling and paint is required to finish the cap off.
Thanks to Jay (GLHNSLHT2) for allowing me to use one of his caps for comparison. (I'll have it back in the mail Friday.)
http://www.thingiverse.com/thing:566126