My wheels are made by Victor Equipment. I bought them in 2006, and paid roughly $350 per wheel (price may be higher now) through an internet source called 'Buy Wheels Today'. The fronts are 18 x 8 and the rears are 18 x 11. I do not recall the offset, but the fitment was also for the 911 Turbo (they didn't have 928's on their fitment chart).