I would ask your lfs for a special order. A fish like that won't do well in the mail. Are you in a big city? Most lfs will special order for you.
If worse comes to worse, it only takes a year or so to grow one to about that size from when its three or four inches. Any lfs should be able to get you a jaguar that size.
Also, post on here if you get them to spawn. I had a pair spawn but none of the eggs made it. They are good parents, just find a way to protect the eggs against fungus. Thats what got all of the eggs mine laid. But, they are still really great fish to have.