It's well worth getting LFB from either HJ, or preferably Cycle Design. The Gasflux bronze is really nice, but the Cycle Design stuff is noticeably better. People report that LWS bronze is all over the map, and this has been my experience. It works, but it really doesn't flow that well.
Last time I looked my LWS had silver and white and black silver flux. They have brass but no flux, unless you count flux covered rods