Probably not.
For starters you're talking in that strange imperial language....
Your best bet would probably be to look outside the RC realm and find a place that specialises in, well, springs, and tell them what you're doing and how much weight, compression etc is to be factored in to the equation.
I always prefer to go in to a shop rather than buying stuff online.
I also spend a lot of time at my local scrapyard digging around in all the stuff they've got laying around there.
For my large project I've got some nice return springs from the backrest of a car seat.
Still chasing some suitable tubing for them though, which I will find one day.
All in good time.
(The pics below are from a mock-up shock I made a while back.)