It raced recently in Copenhagen for the first time since 1964. The owner/driver is Petter Huse - the report reckons the car was built in Norway and is known as the Focus IV, so possibly there were 3 previous iterations.
PS Further investigation shows the report as incorrect - the Focus cars (and there were definitely a Mk I and a Mk III, because they're mentioned in race results) were designed and built by Lennart Sundin of AB Sportscars in Stockholm. Later versions were Ford powered (now there's a surprise........)