Sequentia 50-Pack 1/2-in White Nylon Rivet in the Rivets department at Lowes.com
Plastic Nylon Rivets – Bolt Motorcycle Hardware
5mm Nylon Blind Rivet 12mm Head Grip 4.5mm
Auveco 17101 Nylon Rivet 1/4 Hole Dia 5/16-15/32 Grip Black Qty 25
Amazon.com: Glarks 120Pcs 6 Sizes Black Nylon Pop Rivet Assortment Plastic Rivet Clip Nylon Blind Rivets Compatible with GM Ford Chrysler VW : Automotive