Microsoft has the ISO on their website. Looks like that download requires a key already. Hard copies are still available on newegg and are not bootlegs, as they come with official MS keys (mine and my husband's both did and are legally valid keys per Microsoft).
That's why I said if you need a valid
license key, one can purchase it from Newegg, Amazon, etc.
Or if you're fortunate enough, have someone who has an MSDN Subscription
. I have such a subscription.
But yes. Those downloads from DigitalRiver require an existing license key.