As for the buttons, I've been looking for those that have the LED built-in, You could use DELTRON Tactswitches with Transparent Knobs. They are available in different sizes from www.conrad.de but they are a bit expensive. There is no LED included but can be mounted by yourself (a little bit tricky). Or you could order them from www.farnell.com there is the LED allready mounted but *VERY* expensive. Sorry 4 my bad english.