Driver Side Rear Quarter Moulding Repair

[Jagdpanzer]

I was getting out of the Z the other night and somehow my pant pocket snaged the short molding piece that fits between the door and rear wheel well and broke it off. It broke at the back side tab that fits under the two plastic body clamping retainers. I would appreciate advice on how to go about repairing such as what kind of glue works with this plastic, or where I can find a replacement molding piece.
Thanks,