My laptop computer came with a 3-prong power cord (USA) on the supply brick, but the ground is obviously of no use, and I would rather have a 2-prong cord so I don't have to carry around and use an adapter all the time. But I haven't been able to find one - everything is 3-prong except for the silly little part they gave me that turns it into a wall wart. I suppose I could use that and an extension cord, but a single piece cord would be preferred. Anyone know where to get a 2-prong cord for this odd connector, called "C6" I think? TIA