Bike, I would suspect that your gybe slammed the car into one end of the track, broke off the stoppers, and then the car flew off and shed all the bearings. Seen any buckshot around the cockpit drains? That's them.
In which case this should all be easily repairable. Harken
MIGHT be closed for Columbus Day tomorrow, might not. Odds are you can order a box of bearings and some new stopper hardware (replace both ends while you're at it) and if you ask real nicely...Harken might even agree that stoppers shouldn't disintegrate that way and comp you on the new parts, or at least cut you some slack.
If you really need to sail in the meantime, go to a craft store, buy some hardwood beads, rig
'em up as parrel beads on a loop to replace the car and just sail a little slower till the new parts come in.
Probably take you all of an hour to reinstall your traveller car, unless you've got to chew out the parts that held in the stoppers, or a piece of deck tore out.