Here is some examples of mounting an ASUS Xtion Pro Live on a TurtleBot.
We had some MDF leftover from a previous project, so we used a coping saw to cut out a plate that roughly matched the distance between the Kinect mounting holes on the TurtleBot plates and had a cutout for the bottom of the Xtion. We happen to have some 3" spacers that were tapped #6-32 on both sides, alternatives include 3d printing parts or using wood screws and dowels.
Thin double stick tape seems to hold pretty well but you could also use something like hot glue.
Here is the view of it assembled from the back.
From the front it looks like we might need to paint both it and our workbench. CAD files for making this yourself should be uploaded in the next day or so.
If you want to mount the Xtion Pro Live on tripod or servo, Michael Ferguson
has the parts you need over on Thingiverse.