Does apple have a volume purchasing program (vpp) that includes Macs?

I have about 25 Mac users that I admin for and I can't seem to find a volume licensing/purchasing program for Macs. Does one exist? For example, Apple has removed iWork physical boxes from just about everywhere near my office and I can't get them from any of my vendors online. The only way to get iWork now appears to be through the app store, but I don't want my users to be using their apple id's for the purchases.