Cosmo Kramer

Getting ready to install my Provent on my car and I want to set it up to drain back to the pan. Our good friends at Mann have decided to triple the price of the 1/2" check valve that goes on the return line and 928SP is back ordered on them. I have the one way valve that originally was an insert on one of spouts on the oil filler neck (no longer needed). Could I utilize this in the Provent drain somehow or is there something special about the one Mann sells?