There are a number of good sites with versions and they list 8.00.2283 as downloadable but I can't find it anywhere. I can find other cumulative patches but not 2283.
Here is the KB from Microsoft: http://support.microsoft.com/kb/971524/
You'll need to request the hotfix here: http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=971524&kbln=en-us
I found this from from http://sqlserverbuilds.blogspot.com/
Ooh, Itanium based SQL Server! I never got to work on one of those.... :(
The download works for me here: http://support.microsoft.com/?Kbid=971524
The link came from: http://www.sqlsecurity.com/FAQs/SQLServerVersionDatabase/tabid/63/Default.aspx