I think Met 5514 is what I need - it has the two plugs for the head unit and also the bypass harness.
http://www.tune-town.com/Installation/Harnesses.asp has many harnesses.
Met 5513 is the one for bypassing the amp.
Met 5511 has the two plus the the head unit.
Met 5512 connects to the harness going to the amp only (it is one of the two harnesses in the 5511 kit)
Met 5514 seems to have the 5513 and 5511 harnesses and is the way to go if available.
Am I correct???