controller upgrade

Hi everyone, I'm looking to upgrade my e-bike and I'm wondering if it's possible to just replace the controller without changing the display. I currently have a Bafang 12A controller, a 48V battery and I'd like to upgrade to a 17-20A controller. My display is a Bafang DP-C11 UART and my e-bike...

My stock controller is fried on my "Pedal Electric" brand ebike with a single 48v rear motor and battery. I need help finding the stock replacement. I have spent hours and have no luck finding the exact one....Or..... What I would really like is a programmable controller to tweak the motor a...