Thinking out loud here...
I have no experience with this product or application, but Scotty makes a similar product to the Hobie sidekicks: http://www.scottypaddlesports.com/kayak-fishing-equipment-accessories/stabilizers/kayak-stabilizers.html
You could use (2) Hobie iAccessory mounts or Scotty 341 glue on mounts to mount the Scotty 241 brackets. Not sure how well this will work on an inflatable given the amount of flex in the side tubes. Looks like you could also add a cross bar if you wanted to stiffen things up.
May be able to modify the Hobie Sidekicks to adapt to the Scotty brackets. As Matt mentioned, the inflatables have a wider beam than the rotomold boats, so not sure if the cross bar is long enough without modification. Again, I have no experience with this, so caveat emptor!