I would go to The Custom Saber Shop and get the Graflex LED/blade holder and a Red/Orage LED and optics (Tim gets nice Red/O, so they are more red than orange)
Next, get yourself a 4.8v 2600mAh NiMH battery pack and a MR soundboard out of a Jedi saber (so you have more than one pathetic clash sound). Look on TCSS for the wiring guides, and get 'er all wired up. Viola...Vader ROTJ electronic LED saber.