If you are looking for a set of factory wheels that are chromed, keep in mind a few things. This is obviously not an option from Land Rover. There are several places that offer chromed factory wheels on a replacement basis. You ship them your wheels, then they ship you a set that is chrome. Remember chrome is only as good as the surface prep work that was done. I've seen some that look great, but they usually don't hold up very well.
One final note, the factory 19" wheel is not a very smooth casting. It's not noticable in the factory silver color, but if the wheel is not smoothed before plating, it will be very obvious. I've seen a set that was plated without any smoothing, and it looked horrible. The chrome magnifies any surface irregularities.
If you are looking for aftermarket wheels, be carefull because there are very few wheels that are a proper fitment for the new Range Rover. Momo makes a very nice wheel in a 22" size that is available in chrome. It probably will not be any more expensive than getting the factory wheels chromed properly.
Just my $0.02.
Stephen