Can't find a Windows 7 Family Pack (3 licenses) non-upgrade on Amazon?

Hello.

I have an Amazon.com gift card and would like to buy 64-bit Windows 7
with multiple licenses. Is it me or I can't find a non-upgrade 64-bit
Windows 7 family pack on Amazon? I only found its Home Premium on
http://www.amazon.com/Microsoft-Win...002MV2MG0/
... I assume I need the non-upgrade retail if I want to install cleanly
on computers (one for now, but will plan to install on other machines)
that didn't have previous Windows.

Thank you in advance. :)
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