there used to be a buncha these on Lannie's site..back when there was a Lannie's site..;) but hey, why not?
@judyk- there's a freebie program called 'gearmaker' in Freestuff..pretty simple to use, you select number of teeth, angles, etc., and it makes .dxf files..I've played with it a bit..check it out. (If it's not in Freestuff..a google search might turn it up).

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)