I would give this one a try, only $15 bucks on Amazon. May have to wire up an adaptor for the electrical connection?
25860-62010 Toyota Vacuum Switching Valve Solenoid
https://www.amazon.com/Solenoid-Switchi ... 8VEDFV1K6B
or
Use a universal 12v switching solenoid like this one:
There are plenty of 12v vacuum solenoids available on Amazon for cheap.
https://www.amazon.com/vacuum-solenoid- ... noid+valveYou could rig one of them up to work until you get the correct part? Just be sure and get one that is normally closed.
It is just a simple open/closed valve. Power is applied to it (open) when you turn the key to the on/run position.

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