How to get Shelby Signature

Curious as to what's the best way to get a Shelby signature on my car? Where or what events have people had the most luck in getting him to sign the car? Or is there a way to send him a part of the car (visor, center console, etc) and get it signed (that would be too easy!). Thanks in advance for your responses!

 

Thanks Michael. I checked out the site and found the link at the bottom of the homepage. Thanks again!