It depends on the age of the para. A good way to figure it out is to run over to Gallery of Guns and do a search, either that or go on GB look up a user named 1CCG. He sells paras pretty low and I have bought a few from him.
As far as a blue p14, they have black they had a midnight blue but I dont know if they still do. Its not really a blued finish it is more of a dura coat.. they call it the para coat.