need a pneumatic cylinder with a 9-10" stroke

[Biohazard]

As said in the title im in need of a pneumatic cylinder with a 9-10" stroke for a prop i am making, Used or not i dont care as long as it works.

[Bradenton Haunted Trail]

As said in the title im in need of a pneumatic cylinder with a 9-10" stroke for a prop i am making, Used or not i dont care as long as it works.

Here is the place I buy them: http://www.frightprops.com/pneumatics/cylinders.html