Darth Lucas said:

So I just had a thought. It would be slightly challenging, but if Adywan so wished, he could potentially get some guy dressed up as Vader and another guy dressed up as Ben, shoot against greenscreen to comp them into different death star backdrops, using the actors masked out of the original scene for dialogue and close ups (get a couple screens of ben's face to cover the actor's in wider shots) and expand the Ben/Vader duel to sort of move throughout the death star to make it more exciting, epic, and able to stand alongside the other duels of the saga in terms of excitement and scope. Ultimately they would move so that they end up with Ben's death in the same place as the original. It wouldn't be too difficult, just time consuming.

Honestly I don't think such a change of location would be necessary to give a heightened sense of danger to the scene. In the two or three establishing shots at the beginning of the fight, the view could be zoomed out to show a giant open shaft to the left of Ben (without guardrails of course), with only a five or six foot walkway skirting the side.

Ben realizes that he must make it past Vader to get to the Falcon, and he first tries to cut close to the wall, but Vader blocks his passage. Next he cuts along the edge of the pit, and all that would be needed here would be an added shot of Ben's feet and robes skirting the edge in a closeup. That would go a long way towards making the environment important to the fight.

JEDIT: Adding echoey sound effects which imply open space and perhaps a slight wind ala the Empire catwalk scene would really sell the concept.