I removed the switch from my philips monitor and replaced it with some mains wire. You have to turn it off at the mains, but it won't fail again.
I've been meaning to look for a switch that will fit, even if it's a rocker switch. However it's not on the top of my todo list yet.
Agree, your best bet is to either glue it in the on position (safest) or wire it on permanently (openies) and then put an inline switch on the IEC cable.
I replaced mine from an old crt monitor but it was a pain to install and now 3 years later it is starting to stick.