I have been looking in to getting a grille made out of stainless steel for my face lift Omega.
The company I have found to do this for me make them for only a few Vauxhall's but they have sent me a pic of an astra so to give you some idea of what it would look like.

The Grilles are made from 316L Stainless Steel. They are not coated but are electro polished to provide a long lasting bright finish. Washing the grilles at the same time as washing your car is the only maintenance required, and because there is no coating there is nothing to flake, or chip.
The fitment is made easy by use of locating clips through the original factory fitted grilles and then secured with self tapping screws. There is no need to drill the car.
Now this is early days but if you want one or more info then let me know or the holy count and the company we have found to do this have said the more orders they take then the less they will cost and also just as a thought they may also be able to put the Omega Owners Club badge on to it as well.
Please let us know your thoughts
