Stretch yourself out on a block of 8 or 10 Y seats on the Scoot PER-SIN flight for the cost of one QF biz seat.
Or just buy a seat in Scoot "biz", really a PE seat but is tolerable for the short journey and the prices outweigh the inconvenient timing. (arrives SIN 1am)
Or, QF Y is do-able for the short daytime journey. Even Jetstar or Tiger Air is do-able.