Hi omzeybek,
When Business Schools inform you that you can submit an Unofficial Score (assuming your Official Score is not yet available), they do not expect you to send in a copy of that document. Instead, you can just list out the scores on the application. The Schools will use your Official Score to confirm that what you submitted is true (and the access to that report is typically made available 1-2 weeks after you've taken the Exam). After you take your Official GMAT, the Test Center staff should have a paper printout of your Unofficial Score results for you.
GMAT assassins aren't born, they're made,
Rich