Hi Jeff,
Summitracing.com is where I bought the A pillar pod and the tranny temp gauge from several years ago.
Autometer 15412 'A' pillar gauge pod ($22.95 - unpainted):
Auto Meter 15412 - Auto Meter Pillar Gauge Pods - summitracing.com
Tranny temp gauges, prices and styles vary. Just make sure to find one that fits the A pillar pod. Also make sure it includes the sending unit.
Auto Meter, Gauges, Analog - summitracing.com
I have some pictures in my gallery. Feel free to check them out. I see that Summit Racing offers paint for the A pillar pod. I found a nice colored, textured paint at Lowes that pretty closely matched the interior of my Tundra. You can pull your ash tray out with the colored face and take it into the store for color comparison. You will need to decide whether you want the sending unit in the tranny pan or the rubber tranny line that goes between the front of the engine (it's a hard line that goes back to the tranny) and the bottom of the radiator. I did the rubber line method first, but finally went to the tranny pan method for the stability of the temp readings.
The tranny pan gives the most stable and accurate reading. However it also requires the most work as you have to pull the tranny pan and braze in a fitting for the sending unit to screw into. Another possibility is to replace the drain plug with a sending unit that doubles as the drain plug. I actually bought a 2nd tranny pan, had a fitting brazed in, then replaced the pan when I had the time to do it.
The rubber line method is almost as accurate on the temperature info UNLESS you are in stop and go traffic or other situations that dramatically increase under hood temperatures. Then the sending unit in the rubber line will absorb the extra heat and provide a false high reading. The other challenge with the rubber line method is that you must provide a ground for the sending unit or it won't work.
Let me know if you have any more questions.