In France the IS250 comes in two flavours, Pack Executive (fully loaded, leather, wood, ML, Nav...) AND 17" wheels, Pack Sport (escaine setas , aluminium, ML, NAV,...) AND 18" wheels.
Because I wanted leather seats, I had to go for the Pack executive. In order to add the 18 " wheels that the IS requires, there are two options:
Lexus Pack Sport genuine parts 374 € each
Or auto part suppliers.
My choise went to Kosei RZ Seneica 1442 € for the pack of four. >> http://www.power-tuning.fr/fr/liaison_au_s.../p16500862.html
Hopefully that's how it will look: