Custom bathroom vanity recommendations?

Hi, We are renovating a brownstone and our master bath has some unique dimensions for the vanity. We can go 60″ long but need a rounded front with shallow sides (14″) so the sides don’t jut out in front of the window. There is a vanity we saw in Pottery Barn which is the idea of what we are going for but the wrong dimensions. http://www.potterybarn.com/m/products/brinkley-demilune-double-sink-console-white/?pkey=cdouble-sink-consoles Any experience with someone who built you a custom vanity, would greatly appreciate recommendations. Thank you…