Here's a guy who got one and has it his house. He went on Reddit to show it off and everybody hammered him to make a backup of it. We DO know that it's software running on a PC in a Donkey Kong cabinet and it's not the cheesy flash version.
Also, if you were to do a google search on "Fix It Felix LEAKED" you will be able to find the software on your own (and it's a SUPER tiny download). The above referenced link has files you can use to update the leaked version with more consistent audio, better graphics and more authentic to the movie version.