Bi-Fold Door Glide / Pin Cap

The pin cap of our wooden bi-fold door has broken. Without one in place, the glide won't stay in the track. Our cap looks like a plastic top hat sitting on top of the metal pin. The metal pin is 2" tall, the top is 3/16" wide, the cap's opening is 1/4" wide, and the cap is 3/8" tall.