The PCV valve from Discount Auto Parts and Autozone should come apart into two parts. You only need the metal part, not the plastic part.
When you remove the stock PCV valve, you'll notice what I'm talking about. Don't forget to also remove the grommet that is below the PCV valve. You'll need a pair of pliers to remove it, but with a flash light and a good deal of leaning over the car it should not be difficult. In fact, when you pull on the hose that disconnects from the PCV valve, sometimes the valve comes out with the hose. Clean the grommet by spraying it really good with carb cleaner (I hold it over a plastic container with pliers and spray it well until the fluid pouring out becomes very clear). Be careful putting it back in place, but should be easy with a little patience.
It took me a while to find the PCV valve. Actually, the parts stores people never could find it and it turned out they weren't even looking in the right area.
