The amazing DreamFoil Creations AS350 for X-Plane works on the latest version of the sim but with some issues. DreamFoil has released a patch that takes care of it, though.
DreamFoil is still working on the full-fledged update for X-Plane 11 but they have released a patch that solves the issues a lot of users have found with the latest versions of the sim.
The patch consists of a new version of the plugin used by the model and you can find (and download it) at the .org forums.
Did it work for you? Let us know in the comments section below.