A little info I dug up
[S900 Body Parts] unit : Japanese Yen
-Front Bumper & Spot light kit 120,000
-Front Over Fender kit 100,000
-Grim light kit 120,000
-Door Panel 100,000
-Side Skirt 80,000
-Rear Spoiler 70,000
-Rear Over Fender kit 120,000
-Rear Bumper Spoi0ler 100,000
-Door Mirror 36,000
-Carbon Inner fender kit 40,000
-Carbon Rectify fin for FBS 12,000
-Carbon Rear Under Diffuser 65,000
-Head light eyeline 9,800
-Cooling Bonnet & Pin 115,000
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Total 1,087,800 yen (about US$10,500)
Expensive