Only registered some 2 mins ago .I use to contribute to a great but not very active private forum run by a Joe Tavani regarding all things Costin in general and including the Nathan Astra race cars.
Main pleasure was all the great photos shared which have all gone now with the administrator and forum.
I know quite a bit about the subject having purchased a number of the book "An Adventerous Life" by Roger Nathan and Steph Gullwiezer.

Anyone interested in sharing knowledge ,experience and pictures of the margue.

There has been a Nathan Astra for sale in Basel CH on racecarsdirect for some time now..Expect you will not get a better example of the margue on offer,but it is !50.000 euros