Good ginger beer selection in northeastern MA/southern NH?

I'm looking for a local source for Regatta's Ginger Beer - I'm in Lowell, so the closer to me the better. I'd like to avoid driving out to Julio's in Westboro to get it. :-)

I'm also on the hunt for places with a good ginger beer selection...something that is not Vernors or Reed's. Any pointers? Trader Joe's Tyngsboro only carries Reed's. The Liquor Shop in Tyngsboro has Barritt's in cans, which I just purchased and will try. But that's the only kind they carry. I'd love to find a place that carries 3 or more brands regularly.

Thanks!
--liz