We have an Alltrax SPM 48300 motor controller for sale.
We used it in one of our F24 cars for part of a season (car now sadly retired from competitive racing) and it is not compatible with our other cars.
This controller cost our Young Engineers club approx £250, but we would accept offers around £100
It's also being advertised elsewhere..
Contact me at firstname.lastname@example.org for further details etc.