I would hold out for a complete 8-3/4 rear complete with brakes.
I'm sure you can find one here or in a wrecking yard.
Perfect time to do the swap.
Here's a local one with an open rear but could hold you over until you got a sure grip chunk.
http://atlanta.craigslist.org/eat/pts/3018067933.html
Being in Canada sure don't help but ya never know.