2006 GS450h Replacement Key

[defend]

Hi All, I'm new to Lexus ownership and picked up a great GS450h, high mileage but love it. It only came with one key. I'm trying to find the cheapest solution to having a second key, just in case. Does anyone know the procedure, and what I need to do this, or a supplier cheaper than Lexus?

Thanks

[cruisermark]

Since they are smart keys I believe same applies as discussed here:

 

[SH20]

I bought my 2012 GS450h 3 months ago with one key.  The seller came good and honoured his promise to obtain another key as part of the terms of the deal.

The retail cost of a new key was £385 incl vat.   The reprogramming of the key by Lexus Sheffield was £35 plus vat.   He obtained a trader discount but still ended up paying over £300.   So if they can be bought on e bay as non OE parts and can be reprogrammed then that would the best option I guess. 

My dealer told me they re programmed the new key and my existing key to a new code thereby  making the missing key obsolete.