Ok, so I got bored waiting for my hexy to turn up. So I made an emulator for it.
The code is available on GitHub. https://github.com/distantcam/Hexenstein
Also, you will need some sort of null-modem. I recommend installing com0com. Also if you are running Windows Vista or later you will need to turn on unsigned driver support for com0com to work. Instructions are in the com0com readme.