These posts were helpful:
That's tough! Yes you can order parts through them. I've found CORE to be unresponsive to email or messages on their Facebook business page, whereas DDG always gets back to me. Communication, DDG wins. CORE gives extremely good pricing however, so that may be more important and swings in their...
I should have posted an update - I did figure that out. My problem with the harness was related to the Mopar instructions being wrong. Someone pointed it out in another thread and once the wires were swapped, all was well again.