Yep, I'd have to agree that there's not a surplus on the 737. Numbers seem about right except when they let too many people go on leave over Christmas and can't crew flights 😁
As for the 787 rumour I've heard anywhere between 1 and 4 current JQ 788s to be repainted in QF colours for domestic flying. As for a wet lease - hah! It didn't happen when the stolen generation went to JQ, so why should it happen now the shoe's on the other foot?