I want this one too, but I've resolved to build one from scratch because they are hard to find.
Shouldn't be too hard to build, but its way down on my list projects.
I think nickel flippers will be the hardest part to come up with. Thought about using flipper bats as the handles and use the pawl/plunger with a spring for power to hit the nickel. The rest is just wood, switches, lights, and an Arduino to control the logic.
The payout functionality may be a headache too but I'm sure I can figure it out.