If this rumour is true then the supplier must be offering them at a very low price as there isn't enough life left in the fleet for fuel savings to offset the normally high cost of fitment. Any fuel savings would enable QF to sell more seats on the SYD-BOM sector which currently is payload limited (over 100 seats blocked off from commercial sale).
The winglet manufacturer may be offering QF a very good deal to act as a "market leader" in the hope of convincing other Classic B747 operators to fit them.
