They aren't hard to do. I made this one for my brother's old 190 a bunch of years ago:
Bought gauges, switches, fuse holders and UV stable Rowmark engraving stock. Had a local trophy shop do the engraving and I cut the holes and did the wiring.
Did the same thing with my old 204 as well:
They weren't as fancy as some of the professionally done ones, but they didn't cost me too much either. If I were to do another one, I would use breakers though.