Yes those are the ones. I have them on my clone motors, just haven't seen any for the hemi predator.
Sorry, I read your post wrong. No, I have only seen the cork gaskets for hemis. Odd thing is that for as cheap and flimsy as they appear to be, I haven't had a leaker.Thanks for the link, but I only see the rubber gasket for clone motors and the regular gasket for hemi predator.