Woof. Why would you need a near 15 year-old version of the software? If I recall, that was either when Daz was still charging for the software or just after. You can apparently get 3.1.2 via a magazine with a SN, but I imagine it's out of print (and thus used copies with likely used SNs) and equally hard to find. Might be able to find something via the Wayback Machine, but still might be a long shot.