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You can download the .apk (Adobe Flash Player installer file of Andriod) from this document :
Hope this helps !!
You have to sideload the last version of Flash onto your device and then use a Flash supported browser like Firefox. It's simpler than it sounds. This might help: http://flashforthegalaxy.com/install-flash-galaxy-s/
Chrome doesn't support Flash. You will need to use the Dolphin Browser for the Android KitKat OS. Here's a tutorial to install Flash to the Nexus 5 (works for all KitKat devices too): http://mynex5.com/install-flash-nexus-5/