A MacGyver 3-D rig? No.
I adapted this hack from a post on the NY Times Lens blog from photographer Doug Mills. It lets me get a wide and close-up shot simultaneously while doing one man band interviews.
I simply mount my GH2/GH3 directly on top of my Sony EX1. I keep the EX1 wide and put a 50mm on the GH for a tight shot with soft focus. The EX1 has the added advantage of also recording the audio. Two cameras, one set of sticks, one operator.
Of course you could always punch in on an HD clip, but this lets you maintain full resolution.
Obviously you’ll need two camera bodies, and one should be a DSLR or something light. You’ll also need a micro ball head.
In post I sync all the angles as a multicam clip. I originally sync’d them as a compound clip in FCPX, but this was harder to work with.