Hi Graham and All,
Just closing the loop with the contact I made with Jones Spring.
They can provide a spring to the drawing supplied @£75 +Vat per
That includes bushes drilled and reamed to 12mm.
If anyone wants to go down this route the contact is Kevin,
The phone number is 0121 568 7575, delivery is around 7 to 10 days.
Renegade Karts haven't come back to me regards postage to the UK.
Looks like there are now have some UK options.
Regards
Ian