I just found out that Jet Pens stock Rotring 600 0.5 Drafting Pencils!
Rotring is a German technical pen and pencil company from Hamburg who pretty much set the standard in technical drawing apparatuses back in the 50s. However, they havent shipped to the US in over a decade and the better ware is now Japan only. They are arguably the Leica of the drafting world (expensive, exclusive, bulletproof, obvious but sleek branding). If only they come back in stock, I will buy one and try my hardest to beat the hell out of it, for that is how I show my affection and appreciation.