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I found my fiberglass rope at a farm supply store that also sold woodstoves and fireplace inserts. Lowes & HD were out of stock due to Spring approaching and inventory change over. A guy at HD also told me to check at appliance stores, like Sears, that sell stoves/ovens as the oven gasket material was compatible. The stuff I wound up with came in a package....8 foot length. They had it in 3/8ths and 3/4 inch. Hope this helps...