Hopefully this isn't against the rules here, but just download an untouched MSDN image via a torrent. As long as you have a key it's perfectly legal, Microsoft themselves used to offer Win7 images to the general public from their servers if you knew where to look.
Any image should work with both retail and OEM keys but I believe you have to get your specific version (Professional, Home Premium, etc) unlike with Vista.
Dell provides full install disks with many of their PCs, especially for their business PCs. Our recent purchases of Dell PCs with both XP Professional and Win7 Professional licenses came with full install disks for both XP and Win7.Basically MS doesn't license OEM's to provide full install disks anymore.
Dell provides full install disks with many of their PCs, especially for their business PCs. Our recent purchases of Dell PCs with both XP Professional and Win7 Professional licenses came with full install disks for both XP and Win7.