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I have never seen that style before. They came off of a manual door (wood, I believe). Let me know what you have, wanting to get a quote to the customer.
An option would be the CRL 1NT401 Surface Mounted Free-Swinging Top Pivot as seen here:
And then install the CRL CRL9060TDF Heavy-Duty Top Door Rail Pivot Arm as seen here:
I feel the above arrangement would work, except for I imagine these doors are incredibly heavy, and with only 2 screws on each section, you risk ripping the pivot out of the door. Therefore I would likely order two of them and cut the top pin off of one and then use it as a backing plate, I would counter sink it for a 1/4” screw and likely add a third hole and use 3” long stainless flat heads. technical drawing of the top pivot can be reviewed here:
Download File
and the pivot block drawing can be reviewed here: