E body convertible weather stripping question

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For those of you who replaced the gaskets or weather stripping on your E-body convertible tops, who is the best or most accurate company out there?  My father picked up a set and the rear most gasket where the angled part of the quarter glass meets the top does not fit in place at all.  The gasket is way too narrow.  Dad called the company (forget which company it was) and complained and they said that someone must have repalced the gaskets at one time.  When we pulled the originals off, they still had the stamped on part number and even had a molded in number into the rubber.  So we know for a fact it is an original part.

Any help would be appreciated as this is holding up me from getting the windows alligned since we just had the new top put on.

thanks,

Brian

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