Quick question - we need a case power button for a case that inexplicably doesn't have one. OCUK seem to only sell Lian Li buttons, so my question is - are the connectors standardized, or would a Lian Li button not work? Not bothered about fitting it, that can be accomplished with a drill 
http://www.overclockers.co.uk/showproduct.php?prodid=CA-414-LL - any good?

http://www.overclockers.co.uk/showproduct.php?prodid=CA-414-LL - any good?
. To answer your question though that button would do fine. If you wanted something cheaper you can go to your local electronics shop and pick up something for really cheap (if you're planning on making your own housing for it anyway)