The part # is CAB000040PMA for the roof rack and VTK500020 for the running boards
If you google it, you'll find a bunch of places. Cheapest I saw was $595 for the roof rack, but if you ebay it (or maybe look here) you'll see better deals. I read some guy got it for $100.
oh, and there's this option too for a roof rack. (RANGE ROVER BARS VUB502790) It should fit the RRS, but it's off the RR spec. It looks kinda' weird without the moulding on the car, but it's a helluva lot cheaper, and definitely does the same job.
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