I suspect you simply have a PCV orifice on the manifold, since Rock Auto simply has a PCV Hose and PCV hose clamp for that vehicle/engine.
My car is the same...no valve, simply an orifice tube. it was what I clipped and capped in my initial mod, but because it sits right behind the TB at the place of the greatest variance in manifold pressures, I relocated my MAP sensor to it with a short length of hose and a couple of clamps. (I have my MAP enhancer circuit wiring that lengthens the factory harness, allowing me to do so- check my 2006 3.5L v6 Buick Rendezvous topic/thread for pics)