The Japanese car company Mitsuoka Motors offered a Galue convertible in 2007. The car was based on the Ford Mustang, including the car's 4.0-litre V6 and 4.6-litre V8 engines.

More about this company: http://en.wikipedia.org/wiki/Mitsuoka

Image source: http://www.conceptcarz.com/vehicle/z16570/Mitsuoka-Galue-Convertible.aspx