I had an Omori 45mm boost gauge in my UrS6, it fitted in place of a couple of blank buttons in the centre console.
It had variable colour illumination, so I was able to get it to match the red gauges. It looked almost like a factory fit item.
I've been thinking of getting one for my Cab, but haven't been able to figure out where to put it.
This might be an option.
How visible is it down there though?