3000GT Spyder (convertible conversion) Mitsubishi Eclipse Spyder (convertible conversion) Nissan 240SX (convertible conversion) Nissan 300ZX (Z32) (convertible conversion ) Pontiac Firebird (convertible and WS6 conversion) Pontiac Grand Am SC/T (external modifications) Pontiac Grand Prix Turbo Grand Prix (high-performance turbocharger, body kit) Pontiac Sunbird (convertible conversion) Pontiac Sunfire (convertible conversion) Porsche 944 Convertible (convertible conversion) Porsche 968 Convertible (convertible conversion) Saab 900 (convertible prototype) Rover 800 coupe convertible prototype 1989-1990 Toyota Camry Solara Convertible (convertible conversion) Toyota Celica (convertible conversion) Toyota Paseo (convertible conversion) Victress Car Company (C2 Coupe) References Notes Supplier offers some sunny concepts External links ASC Incorporated. American Sunroof Corporation (West Coast) Companies based in Wayne County, Michigan Defunct motor vehicle manufacturers of the United States Coachbuilders of the United States Convertible top suppliers Contract vehicle manufacturers American companies established in 1965 Defunct manufacturing companies based in Michigan