Ha ha ha....
Btw, if you can somehow adapt a duck bill check valve with that syringe, and it holds well for at least 20 seconds, that might work if you can produce a few pounds of vacuum. I'm not really sure exactly how you'd do it except with maybe an Echo, or Dolmar style tank vent inside a hose.
Ive done some strange things before too, in a pinch.
Good luck testing.