Forgot this one... "ultra175" to save an additional $175 off Ultracore Gimbal Support System packages at http://supamods.com

This one might work with your setup as it's a 16mm post as well. http://supamods.com/3-axis-gimbal/ronin-steadicam/

Or

You can check out this one here which is a pretty good deal for a easyrig with 2 axis spring arm. http://ginirigs.com/easy-rig/ultra-core-support-system-free-2-axis-sprin...

There are a bunch of solutions for you at http://ginirigs.com They have a ton of rigs and easy rigs, etc.

Any tests?

I agree. The steadicam hybrid is really nice as it stabilizes the up and down movements of the 3 axis gimbal which tends to get pretty heavy. If you're a traditional steadicam user combining these 2 technologies not only feels right but gives awesome results. Here's a link to what i currently own http://supamods.com/3-axis-gimbal/ronin-steadicam/

Here's another version of the Roin or Ronin-M steadicam adapter.
http://supamods.com/product/3-axis-gimbal/dji-ronin-steadicam/