The Yakima Land Shark saddles should work. The come in pairs and you can set them apart or as close as you need to support the kayak. I know the outback has a bit of a keel but should not be too deep for the saddles. I carry two revolutions upright on them and they are several inches above the bars.http://www.rackattack.com/product-pages ... nAoddXEAcA
They are also the least expensive of the kayak saddles.
Download the instruction manaul pdf here to see all the info on themhttp://assets.yakima.com/resource/produ ... structions