Also, are there any good suppliers for the big green and red push
button on/off switches? I'm trying to find one in Grainger but their
catalog is hard to navigate.

Grizzly has some large power tool switches:
http://www.grizzly.com/products/cate...spx?key=275010

I agree that Grainger's online catalog is a pain - I requested one of
their paper catalogs, and find that much easier to navigate. (Be
warned - it's a monster catalog, which could easily replace the brick
you use for a shop doorstop!)