[server] Need a source for php5-mysql version 5.3

I have a server with Ubuntu 14.04 Server edition, and I am using it as a web server. I have installed php5.3.0 as I needed an older version to work with some outdated code that I don't want to go to the trouble of rewriting (this is a private project, security is a non-issue). I am also using mySql, and therefore I need the php5-mysql extension. I was able to find a source for the main php package to get version 5.3.0, but I caot find a source containing php5-mysql v5.3.0. Either a repo or a source download that I can build, but I've had no luck. Can anyone point me in the right direction?