If you are talking about the Olympus 11-22 zoom you have two options. The Olympus flat port for that lens and the 14-54 lens cost around $470.00 and the 11-22 gear which also fits the old style 14-54 cost $70.00 new. The problem is that the lens is far to wide to be used behind a flat port. Olympus/Athena also have a 170mm dome port (new $1000.00) which works with all of the following lenses, 8mm fisheye, 7-14 zoom, 11-22 zoom, 12-60 zoom, 14-54 zoom and more. With the 7-14, 1-22 and 14-54 a $260.00 port extension is required along with the proper gears for the lenses that zoom. The 12-60 requires an even more expensive port extension.
I have a mint condition Athena 170 mm port for the Olympus system and the 11-22 gear I would be willing to sell for $800.00 including US shipping. You would still need the port extension tube $260.00 to make it work with that lens.
Phil Rudin
