Quote:
Usually the game port on sound cards doubles as the MIDI port. Do you know how these things interface? Are they pretending to be joysticks, or are they using the MIDI serial channels?

Chances are that it's just pretending to be a joystick. If so then find somebody local with a AVR/PIC/PSoC/your_favourite_uC and get them to make a little adapter to plug it into a serial port or USB port.