I'm interested, too. All of my known sources for surplus powders are either out of it, or up to $99.00 for an 8-lb jug. I'm a one-at-at-time buyer, so adding hazmat and shipping ($20 each) puts me equal to just buying name-brand off the shelf.
Don't have links here, but I've checked Pat's Reloading, Powder Valley, Widener's, Jeff Bartlett and maybe one or two others....oh, gotta check Natchezss.com, too!!!