Old flow dial broken

[Den]

Anyone know where I can get a replacement switch assembly or similar for this cheap pump-box was an old trolley I bought a few years ago just remembered I had it buried at the back of the shed. 

The flow dial snapped off hoping to get to use it again as a temporary van mount.

 

[Deleted member 257]

You’ll need to pull it open and have a look, but you might find what you need on eBay. A PWM controller .

 

[Den]

Inside the box 

Two red wires off the dial they go to the black and blue box