I write a new extension and I can say that is available very soonAllow to create boxes with 9 images for draw undistorted object like dialog box, button and game backdrops. It's very easy to use:
9 Slices Object
Load your images (you can automatly cut a tileset image with the Fusion's import tool)
Know you can see the result in your scene en resize your box:
There are 2 display mode: tile and stretch
The object work for Windows and Html5 exporter and I try to write the Android version.
I plan to sale it for 1.99$ on the Clickstore.
Thanks for your comments, suggestions etc.
See you !