Where to buy yamaha speed sensor pick up?

[CascadeCycles]

Hi, the frame mounted (about half way down the inside of the chain stay) speed sensor pick up on my Haibike all mountain 2.0 broke off the frame and I need a replacement. I believe the motor is a yamaha pw x2. Suggestions where I can buy a replacement?

 

[Jackware]

In the UK, it's listed on Amazon as this;