Radio shack is a very good source for buttons and toggle switches. We have 3 local Radioshacks, so buttons are plentiful, and they come in just the right variety.
Try these buttons:
http://www.radioshack.com/search/ind...0 button&sr=1
and these toggle switches:
http://www.radioshack.com/search/ind...%20switch&sr=1
Good luck!