Quite a few are available in 30", some even in 31".
Havent seen any Carbon Fiber Shafts above 29".
I'm liking my 31" Jacoby Shaft Custom with a 12.25 dia. and conical taper.
I got rid of my Revo, could never get a consistent feel for it.
I have a Meucci Pro carbon shaft that is 30 inches.
I have a white Becue 5.1 carbon shaft that is 31 inches.