That means new front and rear clips, including a redesigned rear diffuser to increase downforce, but a spoiler can be installed if the buyer decides that what he wants. The car won't be an exact replica of the NYIAS concept since that would infringe on Subaru's intellectual property, but it isn't clear yet how the design would be altered. Bond's site says that once he gets 50 confirmed orders, his team will order a WRX and begin the process of creating the new bodywork. It is claimed that once work begins, it will be four to six months to "[present] a completed model for public view."
Bond says the price will come down depending on the number of orders beyond 50, but doesn't give any indication of how much those first 50 cars could cost. If you're keen, though, head over to the site and fill out the enquiry form. Who knows if the Concept 13 will happen, but so far this is the best chance you have of getting what could have been.