I know there are clubs for Island boats and fishing kayaks, but are there clubs for Hobie Mirage Inflatables?
It's a nice idea, but I suspect geography is against you. You'd need a group (2 or more) users of inflatables within the same kayaking area. I don't know how often that happens.
I have a Hobie inflatable which I bought a year ago when the chance of a used one came up. I have so far never used it because I don't have a car (something I hope to rectify it in the near future). I'd be surprised if there's another Hobie inflatable within 100 miles of me. (And 100 miles on British roads isn't fun.)
Maybe if you keep bumping this thread, or post your own approximate location, you might make contact with others near you. Good luck.