"Canopy" Hinges for GSA Panniers - where in CT?

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Title says it all. Can't find anything in our area. Boating guys say they only use s/steel.

They were featured in this thread : https://wilddog.net.za/forum/index.php?topic=112192.msg2197571#msg2197571

Pic from that thread herewith

 

[cocky]

 

[Stofdonkie]

 

[Lem]

 

[cocky]

 

[Lem]

 

[Stofdonkie]

 

[Malmoer]

 

[beeebop]

 

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[RSA_Maniac]