I am trying to buy oil filler cap and breathers for these. I explained to the tech guy at Mancini racing in Mich. what I have, and he claims that these are Mickey Thompson covers and not MPs. I know they are MP and not M/T because I got them directly from a guy at Chysler in Detroit for a magazine article in Hi-Po Mopar. Now it was probably 8 years ago but I should be able to get something for them, no? The filler/breather hole to left and above left-most plug is threaded and is about 1 3/8 inside dia. Any ideas out there?