Aperture 2 Upgrade Download Version (after crash, old Serial Number fails)

History: Bought Aperture 1.5 on disk, then 2.0 upgrade via dowload (yes, I have the receipt from Apple).

Anyway, my Mac Pro crashed, and I had to do a clean re-install of 10.6.

I found a download at Apple of Aperture 2.1.3 (trial version) but I've tried my 1.5 serial number and my 2.0 serial number, and it says both are invalid!!!!

Any idea who I can get Aperture 2 up and running and get back into my libraries? I don't want to buy Aperture 3.