5.1b-3 patch kit

Hello Managers,

I went to the HP website to pull down the latest patch kit for 5.1b-3 and 
after following all the links and finally clicking on the method (http or 
ftp, same results), I received a message saying the file was no longer 
available. The same for the latest 5.1b-2 patch. The 4.0 patches and 
earlier 5.x patches were there and available.

I saw some posts in the archives indicating that HP may (or may not) have 
pulled the latest patch kit. I don't know if this is related to those 
issues or not.

I have found the CDs for 5.1b-2 patch 4, but either I did not receive the 
CD kit for 5.1b-3 or it did not ship.

I am doing something silly again? Where can I get the latest patch kit for 
5.1b-3?

Thanks.
John