White 'grape' vinegar was in Giant at Hyatt Plaza last Friday. I can't comment on red wine vinegar but I haven't ever had a problem finding that. It's usually available in the vinegar isles (labeled 'grape vinegar') of both lulus and C4
I've never seen it...I just assumed because it was "red wine" vinegar you'd probably have to get from the QDC! I've used a red grape one from C4 which is pretty good.