Wanted for mod: Pioneer Opener layer spring

[neillcurrie]

I am short a spring necessary to complete a mod I am half way through. I need a Victorinox Pioneer Opener-layer spring. , Maybe an Explorer mag/phillips spring is a good substitute too? A standard Vic Opener -layer spring won't work, as it needs to have no backtool.
The spring is 2.17mm or 0.0855 inches thick, and almost symmetrical.
I guess a similar thickness spring would be OK as long as I can grind to shape.
The spring looks pretty similar in overall shape to the lower spring in this pic.
Happy to pay $$, or trade to suit.
Thanks