For 25 years, the Country Floral Supply has manufactured and wholesaled silk flowers and trees for America's largest retailers, including Target, Costco and Sam's Club, as well as for high-end specialty stores. It is the parent company and wholesale arm of the Decor Store, whose 120,000-square-foot showroom in east Livermore offers retail customers a chance to purchase ready-made arrangements. The artificial trees -- even a faux saguaro cactus - are astonishingly lifelike.