That the 240 was the same car for 20 years is an absurd claim. It's well known that the NHTSA bought and tore apart multiple 240s when they were updating the US auto safety standards in the 80s. It's also well known that Volvo has one of the most thorough and well-funded safety R&D departments in the world. The 1993 240 received five stars in crash testing from the NHSTA [1].

As for your 960: I can't comment on the ergonomics, never having been in one, but I know for sure that you can still get parts for it in Europe.

[1] http://www.safercar.gov/Vehicle+Shoppers/5-Star+Safety+Ratin...