Curbside Classic posted a link to an Automotive Photoshop artist. This was one of his creations. Check the link at the bottom of the article for a few more.
Here's a few more examples. Might as well archive them here. These are from the Art And Colour of Cars blog over at blogspot. http://artandcolourcars.blogspot.com/
That T-bird one is cool. Looks better IMO than the real '64-'66 Birds.... I don't know who's doing these, but he/she is very talented. On that T-Bird for example, he even took the effort to 'shorten' the front doors, as you would for any 4-door vs. 2-door of the same model. Lots of detail there. He's even got the background of the brick wall that you can see through the quarter glass.