Rear stationary glass seal plastic "rivet"

[toddu]

At the bottom of the rear quarter glass seal, just inboard of the door seal there is a plastic push "rivet" that holds the bottom of the rubber flap. Drivers side is in the car, passenger side I put "somewhere safe so I wouldn't misplace it" - wouldn't you know.

Anyone know of a suitable replacement? Possible it might show up as I move the lift, clean the floor, etc. But, just in case.

Thanks!!

Todd