I just picked up some tundra calipers from NAPA since they have a bucket deal. If you can fit it in a bucket, you get 20% off. You have to buy the bucket but part of the price of the bucket goes to a fallen heroes fund. I guess technically if they were still in the box they probably wouldn't fit but the guy said it was ok and gave me the discount. The deal is only until the end of the month so if you were thinking about this upgrade, go pick the calipers up.
This is how I did my brake upgrade a year ago. 23k miles later they're still going strong and I use the bucket when I wash the 4Runner.
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2008 Toyota 4Runner Limited 4x4 - Salsa Red, DD, Mostly Stock, 89k miles 2001 Toyota 4Runner SR5 4x4 - Not Stock, Lifted, Armored, 291k miles 1987 Toyota Supra N/A - Stock, 2nd Owner, 92k miles