You could try these guys. Not sure if they have as extensive a catalogue as McMaster-Carr but they will supply world wide (or at least that is what they told me 18 mnths ago)

http://www.grainger.com/Grainger/wwg/start.shtml 

And of course there is always these guys (not good for hard core industrial stuff)

http://www.aircraftspruce.com/ 

Cheers.