International Mercantile in Carlsbad is the largest dedicated source of restoration parts for vintage Porsche 356, 911, and 912 automobiles, manufacturing and distributing rubber components, trim pieces, and seals worldwide from its facility on Avenida Encinas near Poinsettia Park since 1971. The catalog covers exterior weatherstripping, interior floor mats, pedal pads, window seals, and engine-compartment gaskets — parts that complement the mechanical restoration work performed at marque-specific dealerships like Porsche Carlsbad on the same North County corridor. Each rubber component is manufactured to match original-equipment dimensions using tooling based on factory specifications, ensuring authentic fitment across air-cooled 356 models through water-cooled early 911 variants. The company ships via FedEx from a Carlsbad warehouse, serving restoration shops, collectors, and concours competitors across four continents through both toll-free phone ordering and an online catalog. Restored Porsches receiving new rubber and trim from International Mercantile often continue to paint-correction and ceramic-coating stages at detail specialists like Knox Detailing in Carlsbad. The 356 door-seal extrusion, for example, replicates the original dual-bulb profile in EPDM rubber rated to Shore A 60 hardness, matching the compression-set resistance of the factory Karmann-era seals within a 5% dimensional tolerance.