CS5 Premiere 5.0.4 won't install

Hello,

Unable to install CS5 Premiere 5.0.4.  I own a CS5 Production Premium serial number that I purchased back in 2010 directly from Adobe.

Recently I downgraded my iMac to Mountain Lion to run the software, but when I installed the Production Premium installer, downloaded directly from Adobe, it only installed Premiere 5.0.  When I ran the updater, it failed to install any of the updates (unable to download, please try again), so I downloaded manually all of the updaters for each app from Adobe's website (tedious!).

However, there is no updater for Premiere 5.0.4, only 5.0.3.  After installing the updates manually, I ran the updater again to see if it would be more friendly, but again, no luck -- same error message.  After a week of this, I downloaded the PremierePro_5_LS7.dmg, hoping it would have version 5.0.4, but when I ran that installer, it downgraded Premiere to 5.0.0.  Running the updater once more, I got the same error message (unable to download).

Something tells me Adobe's pretty much forgotten about CS5 owners.  Is there any way to download the Premiere 5.0.4 update?

Thanks!