article on SPWR also mentions WFR and KYO (Kyocera is not pure solar though) http://247wallst.com/2013/04/26/sunpower-the-hot-solar-energy-stock/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+typepad%2FRyNm+%2824%2F7+Wall+St.%29