2000 Sienna rear wheel bearings

[easytimes]

I'm looking for a good source for replacement rear axle wheel bearings for my wife's 2000 Sienna XLE. The right side has been making some noise for a little while, and our local Toyota dealer wants $345 per side for parts and $114 for the labor on each side.

I have a son who will be glad to do the labor, and between he and I, there are enough tools necessary to pull off such a repair, so I figure to save a few bucks, and make this a DIY project. The car has over 140,000 miles and I just can't see nearly a thousand dollars, when it took two trips to the dealership to make them understand that there was something wrong, in the first place. The place is under new management, from when I bought this car, and I haven't been very thrilled with their recent performance.

Seems I found a Toyota dealer out west, somewhere, that sold me some rear O2 sensors for my Tundra, and for a somewhat reasonable price. I seem unable to find them, now. Anybody have some suggestions or recommendations that would be helpful?
Thanks,