Goldwing, here is one possible source for ready-made cables (again though Ken Hewitt). The PIC based serial cable is $20.00 including shipping - ready to go. There are also cables set up for a USB interface and game port interface (these cost more). Plenty of info is available on the web site. Anyway, I have not tried any of these cables but the PIC based cable looks the same as the kits I got from Ken (and they work just fine). See:

http://www.rc-electronics.co.uk/index.htm

There are probably other sources as well.

Good luck,
Moses