There are a few places that you can get built-in replacement grills… two that come to mind are <a href="http://www.bigjohngrills.com/LM.html"><strong>Big John’s Grills</strong></a> another is <a href="http://click.linksynergy.com/fs-bin/click?id=ZHDpHeSlOq0&offerid=50839.10000049&type=3&subid=0"><strong>Deluxe Grills</strong></a><br />
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They will be more expensive than standalone outdoor grills. Not sure what your other options would be (or how handy you are for a task like this… remember when Homer Simpson tried to build a grill?)<br />
<br />
Dave