The made at least 3 IIRC.
You can verify that here:
http://www.a-10.org/phpbb2/index.php(edit: went back and did a forum search at "warthog territory", it was one afterall, my bad.)
There are no flying NAW's, so one cannot get a back seat ride in one, can they? I think i was a teenager when the last NAW flew.
