Welcome to the Forum AS,
The 2 cars are being put together along with Teamtrain Ltd based in Gateshead. They are being built around the Saturn / Haynes Roadster and are being put together with some components from a Ginetta G20. They will be ran in the NORTHERN SALOON & SPORTSCAR CHAMPIONSHIP organised by the Darlington and District Motor Club, below is a page with details and meetings:
http://www.darlington-motor-club.org...hp?seriesid=29
Also a link to some build pics sofar:
http://www.flickr.com/photos/saturns...7625932340212/
Not sure where you are based though but even though there is no specific race series i am sure there is a local series which can be entered with the roadster car. A local motor club is the best place to start.
Hope that helps....Andrew