I damaged the socket which is part of the harness and the dealer ordered the part to replace it. The socket is the part that is mounted in the metal holder that you plug the large round connector into.

I think each of the parts of the harness have part number. If that's the case I would think they could be ordered separately. Maybe the part I damaged is not considered the harness.

Edited:

Each of the connectors have separate part numbers. Connectors can be ordered, at least I've always been able to in the past. If you could order the connectors you could make a harness. I think that would be quite a pain, but it could be done.