You won't find a bike that lightweight with high handlebars, but there's no reason not to find a lightweight bike and put high handlebars on it. You could have a mechanic put something like this together:
But that high stem and handlebars and those kind of brake levers don't come in lightweight styles, so all those additions are going to add to the weight of a lightweight racing style bike. As others have suggested, you might be putting too much importance on light weight. You might want to go with some fatter tires to smooth out the bumps, in which case you might not be able to put together a bike in your desired weight range. But you can certainly put together a very smooth and efficient bike that isn't super light.