Maybe one of these similar products would be of interest:-
Sigma 258306 105mm F2.8 EX DG OS HSM Macro Lens for Nikon DSLR Camera , Black
Sigma 258101 105mm f/2.8 EX DG OS HSM Macro Lens Canon DSLR Cameras, Black
Sigma 24-70mm F2.8 IF EX DG HSM Zoom Lens for Sigma Digital and Film SLR Cameras
Sigma 8mm f3.5 Circular Fisheye EX DG For Sigma Digital & Flim SLR Cameras