Thank you!!

Have a virtual beer

That's a small diameter spring! but I've found a UK company that specialises in spring manufacture for bikes, racing, motorsports and the like. dfaulknersprings dot com
They list the correct diameter spring for the CR but also make springs to custom specs.
The going rate seems to be around £50 for a made to measure spring so I will look into this over the winter as a quick fix to the weak spring.
I'll let you know how it goes

Stay safe,
JT
