searching for buildable lots with certain criteria

I am currently working with some investors who are looking for buildable lots in areas where homes are selling for upwards of $175/sq. ft and no larger than 2 acres. If anyone has information that might assist me in finding these lots I would appreciate it. I can try to provide you with any information you're looking for as a way to compensate you for this information. Another key element in the equation is the lot must be in an active development- i.e. where homes have been selling recently so that we can get an idea what comps are selling for