You could try:

http://www.volvotechinfo.com/

http://www.volvovira.com/

I looked at the set of hard copy manuls for my 98 (the last
year they had hard copy) and it was over $2000 (two thousand)
for a complete set from Volvo. As I recall, my oners manual
listed an 800 number to call to get the catalog of manuals
(there is a manual for motronic, one for tranny, one for AC, one
for electrical, etc.).

I think you could do the work using alldata. It has as much in it
as some Haynes manuals I've seen for other cars.