Microsoft Licensing Fulfillment (MLF)
(800) 554-8281 (fax)
There is no online way that I can find to order upgrade CDs from Microsoft.
I use eOpen and there is no link from there to order media like there is for the Select licensing program. (Why not?)
You can order Volume license Media for $27/per CD.
You will need your Authorization Number.
They are usually shipped next day air via DHL.