I have some Autometer sportcomp gauges that I've been meaning to post up. They are the 2 1/16" size and the bulb can be changed to any color you want. They are not fancy, but they are accurate and inexpensive. I know I have boost and EGT, and I also have a third but i can't remember if it's oil temp or oil pressure. If you're interested I can get you some actual pics and come up with a price.
They are this style...
