There is a company called Ambella Home, have you seen them? http://www.ambellahome.com/Gallery/Index/1?category=Bath%20%26%20Vanity&subcategory=Sink%20Chests%2C%20Medium%20(34%20to%2036.5)

Good Heavens! A CUSTOM vanity (to the inch and feature) at that 36 inch size can be had in virtually every area of the country for less than 5 k by at least three grand !! Look at custom cabinetry makers in your area. Provide your own solid surface top , faucet etc