Land sales to help two Menomonee Valley businesses expand and hire more workers gained key endorsements Thursday from Milwaukee's Redevelopment Authority. The two separate deals will help Standard Electric Supply Co. with an expansion of its building on the Menomonee River, and let Sign-A-Rama build a new 14,000-square-foot facility in the Menomonee Valley Industrial Center. The two companies currently, and coincidentally, are neighbors at North Emmber Lane and West Mount Vernon Avenue in the…