Pods come in single, double, and triple. They also have a single pod that fits on the steering column. Just search the net and you'll find what your looking for.
I have a triple gauge pod with water temp., volts, and oil pressure.
Cost was around $200 for the gauges(2 1/2 inch) plus around $250
for install. It cost a little more because I wanted to keep the factory
gauges working and the shop needed to install some more parts.
Totally worth it. Looks great.