Whs 3.0 Where To Find

I have been using the HP ex 475 since it first came out. I did upgrade to 2 gig of ram. Now I find out a year late that there is a version 3.0 we can upgrade to. However trying to find this upgrade I feel like Diogenes looking for an honest man, it is nowhere to be found...

I tried HP, no response, I tried the web, nothing. I am not looking for a freebie, just the software to upgrade... An ISO download of the disc, or anything.

Thanks