Free, yes 'free as in beer'.
Download under the App tab here:
Supports Kinect v1 (Kinect for Xbox 360, models 1414 and 1473; Kinect for Windows, model 1517).
Whack it in your appropriate freeframe folder, find it in your sources, stick it in a slot and make that layer a mask layer.
Use the thresholds to set your near and far cut off points, add a bit of blur if you like.
Made with Vuo which now has the brilliant export to freeframe function
If it was 10 years ago this would be cool
Hope someone finds it fun or useful.