Megaspin, butterflyonline, paddle palace. All their butterfly blades and rubbers come from the exact same location. I know this sounds like a conspiracy theory but if you order at this very second, from either of those 3 sites, you will get the same exact model of the blade you choose as you would from picking another of the websites. The order's are forwarded to the same distributer.
Information comes from some pretty damn good sources.
Truth is, you don't have many options in the united states. you can ask for the specific weight you'd like. Ask all three websites, all three will give you the same answer on the weights they have.