I have one. It's the running pony ontop of the 5.0.
I ordered out of the Ford Motor Company catalogue. Here's the link to the store -->
http://www.fordcollection.com/index.html
This is the one I have -->
http://store.yahoo.com/ford-usa/s2303-2.html 
I love it, I never take it off!!! It's gold but you might be able to get it changed to have one made like that... They have a 4x4, Cobra, 4.6, just the pony with the bars, and the 5.0