I have seen them but cannot remember where. The bulldog decal the you put in the rear/passenger window that looks like a bulldog hanging out the window ?
Take your pic to any local Fast Signs, Sign-a-roma type place and they can probably print you one up. Might not have the exact same art work but hey you want to be different right!!!
Find the poker game, get the bulldog to pose in front of a green screen, then I'm sure any sign shop can use that for the pattern.
If you do get it up and running let me know, I would actually like to have a bunch of them made if the price is right.