Figured I would add to this thread as I had the exact same issue hit my LJ today after a run out to the shooting range. Almost crapped my pants when the red check gauges light came on and I saw my oil pressure at zero when I rolled up to a stop at a stop light.. Exact same scenario, pulled into parking lot, checked oil level to make sure I missed something like a giant oil cloud behind me as I burned off all my oil via a leak while driving down the highway, got in started up, O.P. back at normal operating level, then pulled out of parking lot, came to a stop and pressure dropped to zero with check gauge lights. revved engine a little light went off O.P. back to normal. Several more stop lights on the way home without any repeat of the zero O.P. I currently have 83,555 on the clock.
Ordered MOPAR part # 5149097AA (replacement for 4868672AA) today and will install later this week. I'll report back after the install and few days of driving to see if the issue returns for anyone in the future that has this type issue.