I get mine from Altronics. This is what i use;
http://www.altronics.com.au/p/p5470-crimp-pins-2.54mm-suit-p-5472-p-5482-pk-100/

And these for the larger style connector;
http://www.altronics.com.au/p/p5640-oupiin-crimp-pins-3.96mm-suit-s-5642-s-5660-pk-100/

I use these for all the low current connectors, ie switch matrix etc, and Trifurcon pins for anything power supply/hi current related.
I usually get the Trifurcons from GPE or Pinball Life, though i might try RTBB next time i need them (didn't know they had them)