Broken connector

Opened up dash and removed radio... You all know that connector that you should have to "slide up and THEN pull out"? Well a previous owner seems to have broken the "slide up" part. Can I buy this plug from a BMW dealer? Any idea on how to figure out part #? I have a "pin removal kit" that has inserts so I can move the sockets over from broken plug to new plug. If I can buy a new plug...