The brand I got were called Rev EL (REVerse ELectroluminescent). They're about twice as expensive as the regular brands, but it's because they don't have any logos or anything on the face.
The only advice I have about installation is to work really really slow, and whatever you do, DO NOT PULL OUT THE NEEDLES and DO NOT BREAK THE NEEDLES. A bunch of people have done it and they've messed up their gauge clusters. It took me about 3 hours to install them, but I was careful and now everything works fine. As for installation, there are plenty of How-To's online for installing gauges.