PurchasePro Selects Grainger to be Preferred Supplier on its Commerce Network; Grainger Products Join e-Commerce Leader's Offerings to Broad Range of Industry Participants LAS VEGAS, Aug. 6, 2001 (PRIMEZONE) -- PurchasePro (Nasdaq:PPRO) today announced its selection of Grainger (NYSE:GWW) as a preferred supplier to PurchasePro's commerce network that includes more than...