So, I found the model of controller I need. However, the site linked below says "this model hard drive PCB board is not swappable, if you know how to do firmware transfer, you can buy this item."
http://www.hdd-parts.com/20098011.html
What is required to exchange the current (bad) controller for the new controller and get my files back?
http://www.hdd-parts.com/20098011.html
What is required to exchange the current (bad) controller for the new controller and get my files back?