does any one know if its possible to buy just the plastic colour coded under side of the side steps, as I have a chunk missing Sad

Pretty sure you can, send Dan at Duckworths a message he'll tell ya....

http://www.fullfatrr.com/forum/duckworth-parts-vf24.html

 Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Although it's going to be fun getting all the self taping screws out that hold them on.

FWIW though, the trims are around £60 each retail. I bought a complete set of pattern steps from ebay for £130, so if yours have any rotten bits on them it'll be worth just buying the whole step in the long run, even if you only used bits of the kit.