Raymarine DS600X power cable

I have a Raymarine DS600x fishfinder that has a power cable problem. Unfortunatley, according to Raymarine and every retailer I can find is that part number R69074 is out of production, out of stock.

Only half the screen is coming on. And the part of the screen that is on is reading fine. One of the female receptors has a little corrosion on it and I think this is the problem. Is there a way to clean this that might correct the problem if the part is not longer available? Am I just screwed?

Thanks for any help you can provide. I’ve already checked ebay as well.