I also have a 2 year old M12V with a blown electronic speed control.
It looks like the cheapest replacement price I can find for the controller is $90. I can buy a whole new router on Amazon for $159. I'm trying to decide what to do.
It sounds like a 20 amp dedicated line may help prevent this in the future.
I also saw a user on another forum who by-passed the broken speed controller and just ran the router full speed. I could do this and use an externally speed controller, whatcha think?