Correct PVC Grommet

I have a set of Mopar Performance die cast SBM valve covers. I was hoping to use a 1/2 inch outside diameter stock type Mopar PCV in the driver side cover, not the GM style PCV which is larger.
Does anyone have a source for the correct rubber PCV grommet that fits the thicker die cast cover and will accept a 1/2 PCV?
Thanks in advance