This is from TRDjapan's website...

http://www.trdparts.jp/image/turbo-complete_bb.jpg

http://www.trdparts.jp/parts_trdturbo-complete.html

I wonder if/when this is coming?...

I suspect if TRD is going to do forced induction for Scions, it will be a supercharger, like with all the other Toyota motors here.