If you want a 1 piece dual gauge holder, your looking for LoTek at www.gaugepods.com
I have one and a t-top car so I had to cut it to fit. I didn't spend all day trimming and filing to fit like some people, my car is a driver. It looks great from the outside and real good from the inside unless you look really close. You need to install over your factory a-pillar cover.
The guages (most) will have a press in fit so there is no need for the mounting brackets. I had to trim the right mounting stud to make them clear.