Spring rates of discontinued TRD springs?

[ChaosAD]

I have heard some very good things about the TRD springs in general. However they have discontinued the TRD springs for my model of car.

So...

Does anyone know where I can find what the spring rates WERE on the ae82 twincam TRD springs?
Because I want to get some custom ones made up but dont know what spring rate to go for.