Hey folks! So I replaced a window regulator/ motor assembly in the passenger side with a cardone one from rock auto… kudos to that one… however my drivers was pretty messed up so I dove into it only to find that the whole lower metal channel was removed. The brace is still there on the bottom but no channel… it’s not laying down in the door either. Is this a piece I can buy somewhere or has anyone else had any issues here? I wonder if perhaps the speaker situation made the previous owner mess with it and they just broke it off… it wouldn’t really ever go up or down as it should have since I bought it six months ago… American so it would be the front left door… thanks in advance for the help!