I got mine on eBay for about $30 each. They are baffled, I just added some steel wool, which works to capture the blow-by.
I purchased the steel braided lines and clamps on Amazon and did my own custom install. My Z is N/A, but they still capture blow-by.
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~Rob
-DD Air Guide, Stillen G3 CAIs, 63mm Throttle Bodies, Motordyne M370, Berk HFCs, FI TDX CBE (non-res, CF), Sprint booster v3, Ecutek Dyno Tuned, and the list goes on...