I grabbed a MOTORCRAFT EV76-C PCV from Rock Auto (USD$5.06 + shipping) that seals better than any other I've tried so far. Works at the angle ours sits at too. Comes with the elbow adapter.
EV-76-C
D9DZ-6A666-A
I believe the original application was '80s turbo mustang.
It's white plastic - I got the last one Rock Auto was showing, but if you can find one (not a crossed over generic!)...it should do the trick.
Also, since a new grommet is cheap, best to replace it while you're in there: Dorman/PCV Grommet 42049
A Motorcraft EV-93 (D7AZ-6A666-A) in black plastic also seals well - if you grab a used one, don't forget the elbow adapter if your old one isn't serviceable. Just be sure no cracks, etc. Replace if questionable. The PCV on our cars can be a pain to get to sometimes, so best to do it right while it's apart, etc.