Dont know where you can buy it in the USA. But its the exact same as LRP, so unless you really want the different colors, just get the LRP version.

http://www.rctech.net/forum/electric...osram-lrp.html

If you really want Nosram you can order them and have it shipped to the USA from http://www.racing-cars.com/scp/Manufacturer/Nosram.html