DPS has seen a lot of the new new aircraft being used, I dont expect you will have an issues getting a refitted aircraft and its likely to be a newbie.
your probably more likely to see a BSI than refit on the DPS routes these days, as the following are configured for international service and get alot of flying over there
VH-YIA
VH-YIB
VH-YID
VH-YIE
VH-YIF
VH-YIG
only drawback is that the BSI currently doesnt offer any seatback IFE