None of the 2009 models are "identical" to the LN46A650, but you may still be able to get a brand new LN46A650 from a reputable seller somewhere. They're about 9 months from production, so there is likely quite a number of new units out there still waiting for new owners.
I purchased a LN46A650 back in January and now I want to purchase the identical model, so that I can have matching TV's side by side in my entertainment room. I really want the TVs to be matching but it seems that this model is no longer in production. So my question is this: Is there another TV currently in your line that is a model match to my TV?