There are still new controllers for retro consoles (like the NES, SNES, Genesis) that used traditional serial or parallel ports being manufactured. I just bough

There are still new controllers for retro consoles (like the NES, SNES, Genesis) that used traditional serial or parallel ports being manufactured. I just bought a newly made SNES mouse, in fact. I'm not aware of a similar market for retro PC controllers, but I do know people who've modded PC fightsticks (note: not flightsticks) to the neogeo-style game port for use with arcade boards.