I ran across this link and thought I would pass it on. As far as I can tell it looks very promising. I installed the wis and it works for me. Epc is next, but I'll need time later to do it. It was good for me. Let me know how it was for you.
Saab 1998-1999 9-5 WIS:
Saab 2003 EPC:
Saab parts pricelist (enter part numbers from EPC, get the list price):