The Jakks Pacific Namco TV Game contains a 4-way joystick. This is fine for Pac-Man and Dig Dug, but Bosconian (best space shooter EVAR!) really needs an 8-way for full enjoyment. Here's my solution.
If you print one, let me know how it works or if it needs any improvements.
Note: The SketchUp file also includes a more exact version of this one, plus the original 4-way plate in both original and printable versions.