If you can give me a better description of the cable, I might be able to make it for you. I work for a company that makes custom cables, and we're familiar with RS-422. I'm not as experienced with arcade games, and have never worked on House of the Dead - but if you can give me the names of the connectors, and a pinout diagram (or I might be able to get taht info from the drawing) I can probably help you.
Stray Catalyst