On the cheap....
All the auto retailers sell them $40-$50 a set in black or white face.
These gauges are actually quite versatile. You can just mount them as shown or remove each gauge and install it separately, but everybody already knows that. :laughing7:
My personal plan is to either install an oil pressure gauge and a temperature gauge in my custom built console or, if the gauges are small enough that I won't have to cut my dash, install them in a homemade "delete plate" where my AM radio used to be. I have a stereo head unit that is a little too large to fit in the radio opening, so it will go in my console too.
Of course, other options may be to invert the gauges in their cluster (shown above) and make a pod to fit it, then mount it on top of the dash or even on the hood.
Make a pod from fibreglass, or similar material, and mount them on the inside of the driver's side "A" Pillar. If you really want to get creative and are installing a scoop, you could mount the gauges in the rear of the scoop.
Just a few ideas, some of them may be way out there, but I guess it would depend on if you want your car to stay close to original or if you're going custom or restomod.
I'm going to assume that you probably want to stay closer to a more conventional look.