According to the pictures in that ad, the fronts are 205s.
I believe the 190s are cast. There is a lot more involved with changing the size. Now, if they were CNC'd, all it'd technically take, are a few key strokes to get whatever size and offset one would care to have. Of course, they'd be able to charge whatever the hell they wanted for them too.
The first thing that would help our cause out, would be to get the car manufactures to center the body on the frame, or correct the fender differences in the molds, if that's where the real problem is. Jus sayin.