Try this page and choose "customize" (love the internet) - Seybert's shows the 9' as a $600 option.
http://www.brunswickbilliards.com/brunswick_collection/tables/casual/gibson.html
OK, that's just weird. I went to the Brunswick site and got this:
http://www.brunswickbilliards.com/catalog/pool-tables/gibson.html
No option to change the table size, just cloth color and type.
Whereas if you go to the "Glenwood" model there is a menu item to choose size:
http://www.brunswickbilliards.com/catalog/pool-tables/glenwood.html