I like the look of their craft a grain system. Basically choose how much you want of each grain, hop, yeast etc. So you can buy as much of each grain and hop you want to the nearest gram. I just hope they pack each grain separately? If so, my next order is likely to be from them. Plan my brews, and buy exactly what I need, taking existing stocks into account.
http://www.geterbrewed.com/customized-grain-kit-en/
http://www.geterbrewed.com/customized-grain-kit-en/