Apparently the TRD springs are going to be here really soon. They're surprisingly pretty cheap for being TRD parts, plus they're rumoured to go down to as low as 1.5" (doubtful, but that's the current rumour anyway). You'll be lower like you want to be, plus your stock struts will be under warranty if anything happens. Win-Win.
Part number: PTR07-18130
http://www.toyotaterritory.com/scrip...idproduct=1732