Mike;

>>I got an .obj file from MathMod and then made it solid in MeshMixer.<<>>One possibility would be to use retopology tools in 3D Coat or something like Topogun to get a quad polygon layout and then use Max's sub-d to NURBS script to convert that to NURBS.<<

is it opssible in Meshmixer to go form triangle to quads `liKe Michale suggested ?