Digital River has the downloads for the iso of windows 7 sp1 for 32 bit and 64 bit OS. In multiple languages!
Here’s a link to a great resource that has a list of the iso’s
http://www.w7forums.com/threads/official-windows-7-sp1-iso-image-downloads.12325/
From w7forum’s page:
These are NOT illegal – These are just the download links for Windows 7 SP1 ISO which is a retail wrap that offers a 30-day trial period. You need to activate your Windows afterwards with a genuine license activation key to continue using it. Downloading these files from Digital River is absolutely legal and completely free of charge.
Enjoy – I know I had to search for it – hope you find it easily.
While you’re here – shop at www.amazon.com 
They have great deals!