Where can I find Pepsi Throwback?

I have seen quite a few reviews and giveaways around the blogosphere for the limited edition Pepsi Throwback. Well, I want to try it! I went to Wal-mart and Martin's today looking for Pepsi Throwback and neither carried it. What is up with that!

Both of these are large grocery stores so now I am concerned it will not be available in this area. I have a few other stores to check later this week, but I am not very optimistic. I know I live in a small town, but come on stores we like new things too!

Can you tell me where you have purchased the Pepsi Throwback so I can check there. I would really appreciate it!