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I've yet to find any of those numbers to still be available. But most of the basic generic colors off the shelf at JoAnn Fabrics come remarkably close. One of these days I need to order about three rolls of medium gray, got 3 or 4 cars that I need to recover...
Shouldn't be hard to get matched material from a bulk supplier. Pretty sure I've got a sample color chart for rat fur around here somewhere. If there's any doubt, just ask for a sample.