If you cannot fly, you can redeem for a nominee (relative or friend).
Remember with SQ that you can redeem through them on any Star Alliance partner.
As the OP is from Melbourne, MEL_SIN in J would be too expensive. 1110 K fom MEL return and 65K from PER return.
If they wish to fly from MEL then it would be an option to fly redeem via SQ on Air New Zealand to NZ or Pacific destinations.
If booked as a return they can stop-over in NZ as well. = 35K.