Did quite a bit of research before I found that a simple call to Racetech would have sufficed, but am providing this anyways...
There are quite a few threads regarding the non-adjustable forks which are provided on the 696 (43mm USD Marzocchi) and some solutions ranging from fabbed pre-load spacers to replacing the forks altogether. I actually found a thread or two regarding replacing the stock springs with aftermarket, but no part numbers, etc. to get one started, well here it is, courtesy of Racetech, whom I just ordered a set from:
37x315x925 $109.95
Part# FRSPS3732095 (this is for my application, the last 2 numbers will vary depending on the rate you select)
http://www.racetech.com/I actually went with a higher spring rate for my weight (210lbs) but the folks at Racetech can give you a custom rate depending on your needs. Much cheaper and simpler than replacing with another set of forks and likely the best "all round" solution (although the custom preload spacer was tempting). By the way, the customer service at Racetech is EXCELLENT!!!
Garry