A-body quarter window rollers

I'm in need of two of the double roller, swivel rollers as shown in the picture for the quarter windows on my 69 Dart. I know they are available new but I have already bought a new pair for $40 and they both broke while trying to adjust the quarter windows during re-installation. Don't ask me how because they weren't forced or anything like that, they just popped and broke into pieces when rolling up the windows while adjusting. So this time I would like to just take my chances with some used originals.

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