Accurate Digital Tire Pressure Gauge

I take notes and log all sorts of data when I'm racing. Tire pressures, air quality, temp, humidity, barometric pressure, densitity altitude, how many hot dog's I ate that day, etc, etc, etc.

The problem is the old gauge I had would tell me that one tire was 13 psi, the other was 16 psi. Then I'd check it with a Moroso gauge (which I know is a hell of a lot more accurate than the one I was using) and I'd find that both tires were 8 psi (for example). It wasn't accurate, and it wasn't consistent.

Where can I find the gauge that you spoke of (longacre)?