Thanks for the suggestions Fred. I can tell you that the problem seems to be localized to the second Gerber. I bought it used it and it has only recently started to do this. The machine has been thoroughly cleaned.  I did have some media punch pattern problems that were present on both machines which I thought was the problem, but that has been remedied and I'm still getting the jams.
I'm think there is a problem with the machine itself that is not related to the foil or foil cartridge.  I am able to re-create the problem by slewing the media back and forth through the machine without printing.  Sometimes it happens within 2 to 3 feet, sometimes it takes more than 8 feet before the media seems to jump off the sprockets and Jam. This is why I think it has to do with the pressure foot on either side.  I will keep investigating and report back.  I get the replacement parts in a week.