Rear quarter window double roller, 68 dart, help please!

3 years after my 68 Dart tear down it's all going back together and I noticed that one of my rear quarter window rollers is broken at the swivel.
I see them online Year one and R/T but they look nothing like this double roller. Anyone have one or two they could spare?
I would be very greatful.

The one on the right side in the picture is correct, the left is broken i believe.

Thank you