Magnum Heads with LA Valve covers

I've read a few posts on other sites that its recommended I should be running a MP valve cover gasket to prevent leaks. Well no dealership has the gasket and Summits are on back order. Not to mention they are $60. So with that being said those of you that run this same set up what are you using? I want to make sure I dont have any leaks. I was thinking of picking up a set of Felpro rubber gaskets.