Paula,
If you belong to The Country Needle yahoo group there is a ladybug alpha for free. Part line work part filled. I don't know if that is what you want, but it's nice and it's free. But you have to sign up for the group.
I don't know about free, seems I have seen one somewhere (?) But if you google ladybug font+machine embroidery, you will find a lot of possibilities. Maybe even a few ideas! If you have some ladybugs, you might just embellish your favorite font with them. Of course, we have so many talented digitizers here, someone might have one in their collection, also. Good luck! *