Nova Diesel spring rate

[autograss_racer]

Hi, I was running a pair of Nova Diesel springs, but stupidly I sold them. Now I need to buy a pair to sit on nice new struts - can anyone tell me any specs of the Nova Diesel springs as these were really close to what I need to run.
I can work it out if someone can measure a deflection with a known weight i.e hang a kilo off a spring too!
Or anyone got some diesel springs going 2nd hand?

Thanks

Chris