Where can I buy the remote control switch of MN MODEL MN82?

When I modified the MN MODEL MN82 RC CAR, I wanted to optimize the remote control. As a result, I broke the switch of the MN MODEL MN82 remote control. It seems that modifying a car is also a technical job!

What are the differences between the MN82 modified by everyone? Can you share it? Let’s comment and give feedback to discuss what should be paid attention to when modifying this MN MODEL MN82 RC CAR? How to modify it? Let me see everyone’s successful modification cases!