They are still selling Windows 7 on the MS site.
http://www.microsoftstore.com/store/msusa/en_US/cat/ThemeID.33363200/categoryID.62684800?tid=s03RDaJQQ_dc&cid=5250&pcrid=22251294533&pkw=%2Bwindows%20%2B8%20purchase%20download&pmt=b&WT.srch=1&WT.mc_id=pointitsem_Microsoft+US_google_5+-+Windows+8&WT.term=%2Bwindows%20%2B8%20purchase%20download&WT.campaign=5+-+Windows+8&WT.content=03RDaJQQ&WT.source=google&WT.medium=cpc
I am currently using Windows 7 but want to upgrade to Windows 8. Is there any way of doing so online, through a retailer that will simply give me the code and not a disc. I would just buy from Microsoft but it seems they have stopped selling Windows 8 and are only selling licenses for 8.1.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic