I have the Mitchell digital libray manual and its pretty good with lots of diagrams and goo written instructions. It covers the 900, NG900, 9-3 (old style) and 9-5's up to 2002. Ipaid $15 plus shipping for it on ebay and it has already paid itself off just for the diagrams and part number call outs.
www.elkparts.co.uk sell a workshop manual for the 9-5 if you are still looking. I'm not sure if they'll ship to America, but if you want one I don't mind ordering and forwarding a copy on to you? It was about £13 if memory serves and they've got all the info you could need for jobs you can do yourself on the car.