If Flash isn't available in the store or was not preinstalled on your phone, you might be out of luck. I'd suggest going onto a forum like http://forum.xda-developers.com/ and seeing what other users of your device have done.
You are not alone hundreds of owners of samsung phones are trying even dodgy sites that dont seem to work. Pity adobe as a company do not seem to care about annoyed possibly ex customers
I understand the frustration, but we're focusing on application development for mobile, and phasing out the plugin. Here's a post that details our plans.
