4-wheeled closet door roller hardware

A contractor from Boulder, Co says:
I was hoping you could come up with the hardware needed for this sliding closet door.
A customer submitted photo of a closet door roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. This looks very similar to our 23-161 4-wheel pocket door carrier. Please take a look and compare its dimensions to your own hardware. Do you think this would act as a replacement?
A contractor from Boulder, Co. says:
Dave, Does the Roller Swivel up and down at the center pivot point? Otherwise there is a chance it could work. How much does it cost?

Profile picture of Paul
Paul from SWISCO responded:
The 23-161 doesn't exactly move up and down on the pivot as you've described. Each "arm" that holds the wheels can be moved only slightly. You can find the pricing on its product page!
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