North America 4
It was an IRB tournament born to develop North America rugby.
It was played by 2 canadian franchises (Canada East and Canada West and by 2 franchises from United States (USA Falcons and USA Hawks).
In 2009 it has been replaced by Americas Rugby Championship.
en.wikipedia.org/wiki/North_America_4 - Wikipedia pages about North America 4
Moreover, the site www.narugby.com was scanned using web.archive.org