I'm actually surprised your Microsoft rep has not helped you with this. Cause that is one of the only ways to get a legal original shipped to you.
PLUS -> The volume licence version, like most Windows XP, Server products only offers the blessing of not having to worry about product activation. Unfortunately, due to the nature of getting a Datacenter center server operating, your best bet would be to go through Microsoft, mabye even their Development Network.
Though, I don't need to tell you about these, cause your rep probably already discussed some of these details with you.
I hope that didn't totally confuse you.
