Turbobuickmods.com has a few panel configurations for the DIY'er. I also got a 7 hole panel from Bent6 but it looks like turbobuickmods.com is selling the same thing.
Not knocking the guy but I don't think anyone has ever seen his version actually installed in a car. There's a lot more to it than just making a plate to mount the gauges - not for the faint at heart.
Here is one of my first dash panels using Autometer Phantom gauges.