I know this thread is dead, but I thought it was important for future searchers to point out the FCC electronic testing site, which should have RF reports for nearly all consumer electronic devices.
https://fjallfoss.fcc.gov/oetcf/eas/ (search options under Reports, on the left)
If you have the FCC ID of the unit, you can click "Authorization Search", enter the vendor name, and the FCC ID and get engineer data, including 3-D RF radiation patterns.
For some newer, more popular devices (read: iPhone), you might have to wait a couple months for confidentiality to expire.
Hope this helps!