Call FR, they can direct you to their Wildwood division. Talk to the service people and with your vin they can tell you the interior stain used. That way you can find a match as close as possible. I did that recently and the stain I found at Home Depot was really close. Won't ever be exact unless you get some from the mfg. Not sure if they sell it.
Here is FR's number. 1 (574) 296-7700
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1993 Mustang 5.0 Notch 5-speed