OT: Want/need 15" LCD monitors

Hey guys been a while since I posted here. I volunteer at the Battleship NJ and they are in need of 15" LCD monitors for some of their displays. Specifically 15" as that is what fits radar consoles, etc without modifying them. 17s and 19s wont work. If anyone happens to have some or know where we could find some (preferably cheap or free) it would be a help. Especially for a bulk pile of them. I think Dell e15 was one of the models. Jeff