here is a mention of Coastal Electronics and also a blurb from Toyota as to their reasoning for not including an EV switch in american models http://news.com.com/Hacking+your+Prius/210...tml?tag=st.prev Hacking your Prius By Daniel Terdiman Staff Writer, CNET News.com Published: May 22, 2006, 4:00 AM PDT Heaven knows, Prius owners love their hybrid cars. But some of the most passionate among them are finding there are certain factory-set features they don't like, and they're increasingly finding ways to take matters into their own hands to change them. They're the do-it-yourself Prius hackers, many of whom likely are more comfortable in front of a computer than in a garage. But unlike early generations of car buffs, they're more interested in saving the planet than winning a drag race.