There are a few front lip options out there and a couple options that spruce up the rear end, like a rear valence. As far as "body kits" go I assume you are thinking of something like this:
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If that is the case, please don't. There's nothing out there and that's the way it should stay imo. The last thing we need is to make the ST blend in with the ricer crowd. That being said a few guys have done their own wide body job on the ST and some of those don't look so bad if they are done right.