I know this is a rather old post - but in case others are looking for Windows 7 machines as well (and from what I see - there are few of us out there) - it looks like more and more OEM's have decided to offer again Windows 7 pre-installed. Look especially for business machines - as OEM's are allowed to pre-install Windows 7 on Windows 8 Business/Pro machines. A quick look online suggest Fujitsu, HP and Lenovo have a good number of machines for sale with Window 7 Pro.
In case it helps
