Export a unity mesh into 3d package?

I have a primitve plane created in unity. It has been scaled, moved, and rotated. It is the backdrop in my game. Is there a way to get the mesh back into a 3d package? Obj? Fbx? I'd like to throw some uvs on it and get the exact size/position/rotation of the plane to match in my 3d package. I suppose I could read the actual values of the vertices in worldspace through a unity script and reconstruct the plane in my 3d package. Is there a better way?

There is an .obj exporter script on the wiki.