I have purchased mine on Ebay twice. There is an ebay store called OEMarine that will sometimes list seconds because they have a scratch, etc. When I upgraded last year he didn't have any seconds listed but I emailed him and he replied the same day with a price. He will ship priority mail if you request that and you would have the product in 3 days tops.
If you ever have to remove the starboard it will be hard to get out whether it is one piece or two. We used a suction cup to lift mine out when I broke down my old tank.
PS - don't get too many small pieces since starboard floats if not weighted down with rock, etc