The foam from Home Depot is about the best substitute. I personally used a Black RTV/Sealer let it setup some then attached the roof rail weatherstrip retainer. I just have a hard time using foam, it absorbs moisture and will not last as long.
Go with Cobra's advice on the other, those rods are almost the same today as they were 30years ago.
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69 393W Sportsroof deluxe
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