you drive a 2006 so I have NO idea if scosche or metra or whoever makes the converters has em out yet, but check out your local shops.
FYI, GM cars have a different plug than that sony. so do VW's, and I think nissans too. or is that the other way around? anyways, the point is that companies make antenna converters thatll work for these folks. and invariably they must for you too.
so call a few shops and tell them you need an antenna adapter for a 2006 xB, and do they have one in stock.