Controller for display APT intelligent 800S

hi all
I have an ebike rear 26" Bafang motor
My old display broke some weeks ago
I bought a new one. I bought one Electric bike LCD disply APT intelligent 800S
I tryied different controllers but I can't find the good one.
where could I buy the right controller for this display?
Or what is the right controller for this combination motor/display?

Thanks
Angel