Stock Building Supply has acquired ProSource Building Supply Ltd, Houston, TX, a construction services business supplying commercial doors, trim, hardwood, related specialty products and installation services.   ; In the year ended Dec. 31, 2006, ProSource had revenue of $17.2 million. The acquisition is in line with Stock's goal of expanding in the commercial and industrial markets.   ; Stock Building Supply is a company of Wolseley plc, a global distributor of plumbing and heating products as well as building materials. Wolseley announced five bolt-on acquisitions this month, including two by Ferguson and two in Europe. These acquisitions are expected to add 110 million pounds to total revenue.