Legend rotors are the same size as the ITR rotors, but they too are 5-lug, you'd have to get them redrilled to 4x100. ITR calipers will bolt up into the stock caliper brackets, however, you WILL need at least 15" wheels for it to fit correctly.

I know one or two teg owners who fabricated a bracket to fit NSX calipers onto their Legend/ITR rotors. You could look into that as well.