What brake fluid reservoir should i get???? Rizoma ? gsg?

I am buying a new brake fluid reservoir and dont know witch to get. I really like the rizoma's price like $90 but hear they leak slightly. But on the gsg's it took 2 months to get my headlight kit from wildhair. And I need to get it quickly with in 2weeks. Also what size do i need? I have the 2005 1050.