It's a black plastic box, attached to the underside of the seat. Honda shows this as a unique part to the 2003 6-speed (manual transmission) cars. Does anyone know of one in a junkyard, or is parting one out, or has a driver's seat sitting around?

 

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Looks like these guys have a six speed, though, it appears they want to sell the complete interior or at least a whole seat?
No shipping as well.