Need advice for DPS failure

Hi everyone, new member here. I've run into some issues with the DPS of my Entune Plus in my Canadian 2016 SR5. In a nutshell: -30 Celsius weather one night, and the next day all my front speakers weren't working anymore.
After some unsuccessful trial and error (which involved buying used head unit and amp on advice from local shop) I took it to Toyota and their electronics specialist said that the cold had done something to the wire coil going from the head unit to...wherever it goes next, the amp I'm guessing. So all he did was unplug the coil from head unit and replug it in a different connector in the back of head stereo unit that bypasses the DPS altogether and...voila, all speakers work. Or at least that's how they explained it to me. He said it's actually a common problem with the DPS unit that Toyota Techs run into. But I definitely do notice a decrease in sound quality. Then I get told by Toyota that the wire coil costs something like $300can and is DISCONTINUED!!! On a 2016!!!
Anyway, been driving this way ever since. If anyone can point me in right direction on how to recover my DSP for less (where to buy, how to connect myself) I'd appreciate. If I can upgrade something while I'm at it I'd be happy to, but not willing to pour too much money into this. Thoughts?

 

Hey again, given how much responses the questions usually get on here, I'm surprised no one has had the beginning of an answer for me yet....anyone catching this just now and have something for me?