That looks like it was probably done by an artist for a guest at Walt Disney World's Port Orleans Riverside or maybe French Quarter Resort. I can't quite read it. Many places like that have artists who do a quick portrait while you sit. I doubt you'll find an exact copy of it anywhere.
that looks like a Caricature someone would make as a sidewalk artist.
artist wise, i'd contact the disneyworld you found it from and ask if they recognize the artist. they would be able to pin it down better than we can. pretty sure they would need a permit to work there.
if you own the piece you could just copy it and have it printed again. its not really the best way, but the chances of finding the artist might be low.
What you are asking for could be a violation of the artist's and maybe even Disney copyrights. You can not just make a copy of that piece without the permission of the artist. And Disney being Disney, they may also some rights to it, especially if their name is anywhere on it.
Of course, you could proceed with the philosophy it is better to ask for forgiveness than permission and just make a copy of it. But if you are going to do that, I would certainly not be broadcasting it all over the Internet. And I am not suggesting you do that.
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