Troy:
See the link shown below.
Your choices are, basically, the following:
1. Nulites;
2. FiberLight's; and
3. UMA's backlighting.
The FiberLight system is intriguing, in that it has a central light source, with the light, itself, distributed by fiber-optic strands. Minimal heat, potentially-easier installation (not sure about this one), and I have seen it in action, and it looks good.
The NuLite system is basically a mounting ring with lights integrated, that goes between the instrument and the back of the instrument panel. It seems to work pretty well, but there are those who think it moves the instrument further back in the panel than they like. I don't think it's a real problem, but it does make the instruments slightly more difficult to read when viewed from an oblique angle.
I have not seen the UMA system, so I cannot comment upon it, other than to say that other products produced by UMA that I have seen appear to be of good quality and design ethic, so I would not be surprised if it was a good system, as well.
If you are interested, I have one NuLite unit that I purchased out of curiosity, and have never used, and you're welcome to review and evaluate it.
http://www.aircraftspruce.com/search/search.php?s=panel+lighting&x=0&y=0