Well, failing the laserdisc, I'm going to suggest the unthinkable: the DVD. You may not get the whole thing, but pieces of original footage can be found there. There is a fair amount of unaltered footage in the films themselves. There's also the supplemental material. Empire of Dreams, for example, shows the first entrance shot to Mos Eisley and the Sebastian Shaw ghost footage. I'd rip that and splice it in.