The 5-speed Troopers have an MUA-5 transmission which does not work with the Borg-Warner TOD transfer case. Ditto for the Opels and the Holden variants.
A peek into the cockpits of a few rally VXs (the one in the "Rally VX for sale" thread, the Bell Sports VX, the 98 Dakar VX) all show stick shifts, but no TOD interface (at least not one that I can see). These could all be MUA-5 trucks -no TOD.
Now, look at the Geolandar or Baja VX. This one has some serious work done to it everywhere. If I were looking for a high-speed TOD interface, I'd look on this one. Sure enough, a peek into the cockpit reveals a.) a stick shift, b.) a transfer case lever, and c.) a 4-position switch -hmm, I wonder what this is for?
Look here:

This is the guy we really need to look at. There should be hundreds of pictures of Hanawa's VX out there. We just need a picture of its belly.

For those who haven't seen the links, here is a great page -save it to your favorites.

http://park16.wakwak.com/~kero/vehicross/main.html

EDIT: I should note, there are two 4-position switches. The one that really draws the eye (and is labeled "torque xxx") is located next to the "fire" pull on the left side of the picture.

As for the TOD, I've decided to keep it (rather than go old-school T-case). The TOD has been proven to take a 500hp beating, plus it has a cool factor that a simple 2 or 4 T-case can't match.
I only want manual control of it sometimes.
The TOD controller (as it is coming to be known) is really not going to be that difficult to construct. We need:
A PWM generator (maybe a 8038 IC, old but effective),
A method for adjusting the frequency -we want 50 Hz, or cycles per second. This matches the TOD's 20 millisecond response time.
A means to vary the control voltage, and therefore duty cycle of the pulse width. 20% duration and lower = 2wd, 85% and higher = 4wd, and everything in between.
A nice interface to the dash display -this is proving to be the most difficult part, but it should be engineered in from the start.
There's a recent thread which outlines most of these requirements, I've just been forced to put my testing and prototyping on the back burner for the last month due to a heavier load at work.