There are business class reward seats available on MAS from KUL-SYD but only economy from LHR-KUL at the moment. MAS only sell cash seats 330 days in advance though, so maybe check back in a few days for the return.

EDIT: Actually, there is an AMS-KUL-SYD in business for 110k and £260.40 on the 20th. Bargain!

PER-KUL-LHR is available on the 3rd for 95k + £267.40. Hopefully the 5th will be released in the next couple of days?