Figured out enough to model the CXA2075 from the datasheet, with a workflow that goes from OpenSCAD to MeshLab to Wings3D to KiCad, as described here:

http://www.sl-alex.com.ua/en/page/3d-models-for-kicad-part1-openscad

I pretty much just took the example and modified the parameters to match up with the datasheet.  The trickiest part was colorizing the model in Wings3D, as its UI is a bit...um...unusual. :-|

Once I had that done, I found that the footprint I created could use some adjustment, so I tweaked it, reworked the surrounding traces, and redid the board render.

As another option for generating 3D models, I took a look at Regard3D:

http://www.regard3d.org/

It did surprisingly well with a small set of low-resolution photos provided as an example.  It'd be interesting to put a part on a lazy susan, spin it in front of a DSLR, and see what kind of models that method can produce.