Here is one, they might have what you need.
http://www.mcmaster.com/
Good luck, I'll look for more. What bit shank dia,size,type are you looking for?
Here is another.
http://www.use-enco.com/
and another
http://www.grainger.com/
One of these may have what you need and ship overseas.
For that matter
http://www.bvmjets.com/
sells a carbide cutter set they say is good for cutting carbon. Or you could perhaps email them a request for info as to what they use in their machines.