Need help finding Pilot Valve for safety device

[dsmtuned]

I am having trouble finding a company that makes a piloted solenoid valve for my application.

My plan is to make a boost decreasing device, triggered by a lack of pressure in the WI system.

The WI system will have a T that will connect to the pilot trigger on the valve. The valve will be *closed* when the pilot trigger has pressure from the WI. If pressure in the WI system falls then the valve will *open* and the boost controller will be bypassed allowing the max turbo boost to be that of the wastegate spring.

Simply, What I need in this valve:

1) the pilot trigger must accept 120psi of fluid
2) the valve must be normally open and close when the trigger has pressure applied
3) the fluid in the pilot must not interact with the other ports on the valve

Mac Valves has some good piloted valves that I have used before, but the ones I have used are for air only and have not been externally piloted.

Do any of you engineer guys have suggestions on a company that has a valve to fit these criteria?

It's been a long day, so if I didn't make myself clear here, please let me know and I will try to express myself better.

Thanks for any suggestions!

-Craig