This topic came up in a search on Google for the grill so I thought I would throw my pennyworth in.......
I just ordered one of these Antara's (2013 Diamond AWD) and when I asked about the price of this extra from Vauxhall I was told £190 less some discount if I fitted it myself.............(Son does bodywork and spraying).
Your reduced price appears to save me just £1 at full retail....???
My thoughts were surely that the actual manufacturer of this item would have it priced at considerably less than a dealer who has to add his mark-up and Vauxhall tax?