After reverting to Mavericks, I need to find a version of FCPX 10.1.4 in order to work with this OS....anyone know how to find previous FCP versions?

I unwisely upgraded to YOSIMITE last week, and quickly realized not all of my app's were supported on the new OS.

Today I reverted my macbook back to MAVERICKS. When trying to download FCP from the AppStore, it only gives the option to download the new 10.2.1 version - which doesnt work with MAVERICKS.

Any help locating the previous version of FCPX 10.1.4 (which I bought) would be greatly appreciated!