I'm wondering what other rings besides Goetze or OEM are used? I see the Goetze at $22 and the OEMs at 6x that

Perfect Circle is now Mahle so I'm assuming the OEMs are Mahle/Perfect Circle? I see Hastings makes them, Total Seal shows a conventional set for the 3.0L only. Federal Mogul owns the Goetze and also Sealed Power brand I'm pretty sure.