Sherry,
First off, welcome to ChiefDelphi. This forum is dedicated to supporting teams participating in the variety of
FIRST robotics programs. If you're interested in these programs, you're welcome to stay and find out more about them, but understand that we may not be able to help you, as most of our members are concerned with just robotics.
That said, I too have had run ins with object enablers. If you haven't been to Autodesk's
Object Enabler site you should try there. Don't bother with the "made in this version, opened in that version" part, as the lists are incomplete. I'd try downloading all the Civil 3D OE's and all the Land Desktop OE's. If none of these work for you, then I'm afraid you might be out of luck. There are some objects that they just don't have Enablers for.