A very interesting question, posed at this time. After all most of the time Aussies would have to choose Bradman, but with their lack of spinning options, Benaud, Warne, O'reilly, Grimmet and Warne must come into it. I'd go for Benaod if I were them, gives you spin and strenghtens the batting line-up.
Hammond, as others have said must be ours, we still need to score runs from six, but would be a useful fifth bowler.
Van Der Bijl for Saffies surely, struggling for a third seamer after Morne and Dale, and he'd be a perfect foil to them.