I have a complete clayton rolling road which was fully working when i removed it but has sat around for a few years now. I still have all of the bits that go with it ( pump, tank gauges etc).

it was fully manual control with no data logging but would probably make a good basis for upgrading to yourdyno electronics.

I'm located in Birmingham UK

message on here or email swmotorsport55@gmail.com if you want more details