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Is this what you are looking for?
http://www.ebay.com/itm/LEXUS-IS-IS250-IS350-CHROME-TRUNK-LID-GARNISH-BAR-TRIM-MOULDING-JAPAN-JDM-VIP-/360636775021?pt=Motors_Car_Truck_Parts_Accessories&hash=item53f7a07a6d&vxp=mtr
^Yup, most likely vinyl wrap. I just did mine but in dark grey since my IS is Obsidian.. Or you can buy a cf trunk and paint it, leaving only that area exposed cf.
Most likely vinyl. I have mine like that but the car is vinylef and stock black color behind the frame. All you need is to decide on the color vinyl you want.