There is also the Speedway kit. They offer a housing with drum brake kit and axles with multi-pattern hub for about 800. Or they did last year when I bought one for a project. Had a very large range of sizes. Not bad for all new. Doesn't come with a drop-out.
the 2900 dollar deal from Just Rear Ends if it's complete is pretty good if you also get your choice of gears. Does it come with a limited slip or?