gear generator

Hi. Turbo cad has gear contour, but only in the pro version, and geargen1.1 is only a DOS version. So it seems that Draftsight does not have anything like this at all.  What I need is a gear generator, so that I can draw gear change gears for my Lathe.

Can any one out there help with this problem, or better still Draftsight incorperates it in an update.

John Holloway