I used to use SP esc's and motors, but stopped when they seemingly went out of business.
I still have some of their products, looked in my garage and found a green, blue and red sensor. The yellow is still in the motor of a car my son runs in a novice class.
How can you tell if these are for V3 motors? -if you can use them PM me and I'd be happy to sell them to you. They are all in working condition and barely used.
(see photo)