If you are looking for an aerodynamic disc front wheel, then stop looking -- it isn't recommended because the bike can be difficult to control in a crosswind ...
OR, were you looking for something else -- a 650c rim on disc brake hub?
Be mindfull of the fact that UCI rules state both wheels on the bike must be the same diameter. 650c/700c "superbike" setups have been illegal for racing for some time now.