http://www.summitracing.com/parts/SUM-G1433/ This is a simple single switch, but I'd go ahead and rewire everything and put it on a good switch panel like this
http://www.summitracing.com/parts/MO...1/?image=large
The good thing about using a push button start is you can seperate the starter and ignition. This way you can have the starter spinning then turn on the ingnition. Makes starting a high compression motor a lot easier!
Several kinds you can use just make sure you have some extra switched because you'll always add a few things down the road.
Hope this helps!