If #2 screws aren't too large, here's one source, U.S. based unfortunately;
http://www.smallparts.com/Brass-Scre...AF&pf_rd_t=101

I can't find my metric rule, but a #2 screw would be about 2.5 mm in diameter.
Micro-tools has machine screws, but they don't appear to have wood screws.