I'm in the market for the same at the moment, there are a few out there for sale with the Timing Chains replaced but you'll have to be patient for the exact spec model to surface!

On a personal note, I'm considering going for an early 07 pre-LCI model. I'm the kind of individual who will be listening out each day for a rattly chain, even though the car (LCI model) may be perfect!

People have different opinions regarding Timing Chains, some say stay clear and if budget allows go for the 6 cylinder 525/530 option. The rest say they have never encountered problems and it's over hyped. Personally, I shalt be taking the chance if the chain isn't done!