Weird that they'd use white lights for guages and switches. My 97 switch lights are amber and me guage lights are red. They make a number of replacement Rocker swtiches in various colors. New switches come in LED as well. Take a look here:
http://www.defender.com/product.jsp?...113&id=1016873
As for the guages. I'm not sure, however I would suspect you could swap out just the light. I can't imagine you'd need to change the entire guage just to replace an bulb or a blown element.
Here is a Faria guage installation guide. Note it includes a paragraph on how to change the bulb:
http://faria-instruments.com/site_manuals/IS0029D.pdf
NOTE: To replace light bulb, twist black socket assembly one-eighth turn counterclockwise until it pops out. Bulb pulls straight out of assembly.
It is a GE No. 161 instrument lamp.
I would pull the bulb from one to make sure it is, in fact, a GE 161 Bulb. You should be able to find replacement bulbs and most likely find them in LED if you want. Probably not necessary to have LED, but they do last a LONG time:
http://www.defender.com/category.jsp...5136&id=296901
I hope this helps. Good Luck.