I have yet to see them in person also. The 19's are the wheels that the "ringer" car that the magazine, nameless tested a N/A car with. You can see what they look like on that small insert page area that you mentioned. If you call Saleen you can order them. I don't know any of the pricing. As of last week there were not any at the warehouse.
Until I see them on a real car I wouldn't be suprised if they nixed them. You never know. I would be curious to see what they looked like on an SN95 application. Slightly different offset I believe.