I managed to put this together today. My father in-law made this pump up for me back when I started the EC300 but I ended up buying a Jung for that instead so I thought I would give it a shot in the Tigercat. It is made up of some "secret" gears and a CNC'd aluminum case. The drive is the original out of my excavator....
http://youtu.be/Zc13A6xJLKE
Thanks for looking!