Made another run to the auto store today to look for a grommet that may work. This is what I came up with. Mopar PCV grommet from Oreillys part #42344.
I traced the outline of the cutout on the valve covers, then traced and cut that outline onto the grommet.
The grommet fits on there nice and snug, then pushing and pulling the pcv breather out of the hole is super snug. I may throw a little gasket shellac on the edge of the grommet where it makes with the valve cover just to make sure nothing can seap out.
I'd love to find some mopar pcv and breathers for both sides one day but for now I think this should work. I'm going to work on some baffles now. Trying to decide between 1 large one or a couple of small ones on each side.