I purchased it here;
I bought connectors (svideo 4 pin mini din) because the pin assignments of the DVR inputs did not match those of the camera cables. As well the ground was not wired to a pin. I had to cut and modify the MM (mobile mule) adapter cables and solder them to the connectors I purchased to arrive at pin compatibility. It was difficult soldering since the connectors are quite small. That and the ground being via the shield makes it a bit "Rube Goldberg" but it's all there. This way I can unplug the DVR and put all of the cabling back without effort.
Once that was done, I mounted the DVR using double sided tape under the dash panel that is velcro'd in. The GPS sensor is in there with it and works fine since it is only covered by plastic and glass. The forward facing cam sits on top of the dash and I was able to snake the cable to the DVR. The turn signal indicator lines were migrated to the DVR input so the cameras are appropriately selected for display. The video into the dash display is driven by the DVR (only). The dash display is left on "forward" full screen. The DVR defaults to the rear cam but shifts to the mirror cams when the signals are active. I believe I also purchased the remote controller option for the DVR since I buried it in the dash.
We have had it installed for several trips now and so far so good. If there is interest I will try to remember to take some photos and post a short video clip from the DVR.
I wish everything was HD but close in vehicles are easily identified.
Everything was easily accessed in our case.
I will see if I can locate my notes on the RV. I think I have the pin assignments there.
Edit: I found the dox for the Triple Vision and appended them. The file is a bit rough but if one googles around the formal file is out on the IRV2 forum somewhere.