I've seen used TRD supercharger kits for the toyota V6 in the recycler
www.recycler.com for as little as $1700.
I don't know your location so that may be of little use to you. but $1700 for close to 90 extra hp is a pretty sweet deal, especially when it is CARB certified smog legal and does not affect the factory warranty.
I love forced induction. One of these days my tundra will be sportin a huffer.