I actually found them in K-Mart down here in Naples for 7.99!!!! (no kidding) But there were only 2 left.
I bought them both, I like the feel of them and plan on converting them to 7800 controllers being that they have real 8-way constrictors (instead of the 'box' constrictor which makes you hit diagonals WAY more then you want to).
I already made the 'look alike' earlier Pac-Man model a 7800 stick (but it's only 4-way - good for maze games but not for things like Scramble, Asteroids, etc.).