Set up Kodi ahead of time
This streaming client saves you the trouble of having to actually search for streaming sites by aggregating that information into an easily browsable interface, which allows users to stream movies, live TV shows, and -- you guessed it -- PPV events. It runs on every major operating system, from Android to OS X, and it'll even work on your Amazon Fire TV. Best of all, it only needs to be set up once.
Of course, if you didn't have the foresight to actually install Kodi in advance, the length of the setup process all but ensures that this isn't really a practical last-minute option -- even if you use the TVMC custom build.