I'm going to go out on a limb here, and say an NOS Pacman Stick.
About impossible to fine though.
Barring that, I'd go with an original Pacman stick.
You can find used ones on ebay pretty regularly.
The only parts that can really wear out are the grommet, and the leafswitches.
The leaf switches don't wear out that easily, so the only part you MAY need to replace is the grommet.
Those are up on ebay all the time too.
The Happ reunion sticks are supposed to be pretty good, as a third option.