To be honest, I can determine that buying the gauges from cockpitsimparts was the first kick that got me into the cockpit, realizing that this project is absolutely a choice, and consideration of what I can do, given the time and budget I have.
So lets talk about gauges a little.
As mentioned, I bought mine, but that can be easily done with stickers.
You can find a good resource at Peter's website, from Build a Boeing,
just stick them on Acrylic, and there you have a dummy gauge !
Peter had some great simple ideas, that anyone with a little of work can make a great looking gauge, the same way I did it.