Depending on what you want to monitor...
Autometer is the most common brand. There are others like VDO too. Try a search for Automotive Gauges on google and you will find some that suit you.
As for me, I have the Autometer Ultra lIte Series in my truck and they tie in well with the "titanium" faced gauges in my instrument panel.
_________________________
Jeb aka Ag Bullet
2001 Frontier S/C CC
www.nissanfrontier.net My Ride Most of the world's problems can be solved with blunt head traumas.