These skirts are a direct fit over VT kitted side sills and are more classy than the carzone items if your looking for bigger skirts.
http://www.espdesign.co.uk/esp.store.../Product/35005
Plus they are made from ABS not crap fibre glass so they should be stronger
Be warned tho these do sit abit lower than the normal VT side sills so if your lower than 40mm you could have clearance problems - I quite fanced a set to go with my RS-S spoiler before I got the Track Slag Bug