Gauge set upgrade - 2006 21v

[seve22xmen]

With the StarGazer PP installed in my rig, I am now staring at two inoperative gauges on my dash and would like to upgrade them to something operative and informative. Air/water temp would be great and am looking for other ideas. Thoughts?

[99bison]

Replace whatever was in there before? They are probably under lifetime "warranty" from manufacturer - you get them for the service fee... Around 30-40% retail list. At least my faria gauges are this way.

[seve22xmen]

So the issue is that the electronics are now directed to the Perfect Pass gauge and the other two have been "disabled". Pretty sure that this is standard once PP is installed. Looking for ideas/recommendations on what to replace these with. Air/water temp? GPS? Where would I find gauges to fit?