Glass storm door hinge

A handy person from Mahomet, IL says:
We have owned our house 19 years and this glass storm door was in place when we bought it. I cannot find any labels or markings on any edge of the door which identifies the manufacturer. One of the three hinges is compromised. As you can see in the picture the top white pin has slid down and out of place. I can push it back up and it stays put for several uses before it comes loose again. It seems like a strange setup with separate pins at the top and bottom - I'm not sure what normally holds these pins in place. Please help identify the manufacturer so I can get some replacement parts - even the whole z-bar if necessary.
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Bob from SWISCO responded:

I am afraid we can't replace Z-Bar hinges like this. You might be able to repair some of these hinges with our 40-165 Repair Kit, but I can't say for sure. I apologize we can't be of more help, and best of luck with the repair. 

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