Staedtler Compass

This outfit in Canada sell packs of 12 for $16.20, or if you have shouldered needles, $18.20, they are just past half way down the page, below the bow compass on the right;

http://www.smithdrafting.ca/supplies2008ca.htm

If you only want 1 or 2, try contacting some suppliers as opposed to Staedtler & keep in mind that most manufacturers use the same size of needles (Rotring, Helix.......). Google "draughting supplies" to find some suppliers.

Check the craft and office supply stores which carry drafting supplies...you'll probably find them there. Or you could do a search on Amazon.com, I do a lot of my shopping there for all sorts of stuff.