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.
There is a business-specific Apple Store located here: http://store.apple.com/us_smb_78313/browse/campaigns/business/introduction

Apple also maintains a fleet of direct-to-business sales personnel that you can talk to for volume purchases and after-purchase care for your staff. To contact them, call 1-800-854-3680.