A poster here named Cat used to mention buying $1000 bags of large dollar coins. I think you have to explain to your bank that they have to special order them, in that there is no mention of them on the order form they use when they order money from the courier company. I think it was Brinks that got them for her, but I cannot remember.
Anytime I have picked up large quantities of loose Ikes from banks they have always been non silver Ikes that are not rare and it has been a waste of time.
Somebody here once posted they bought a bag of them and it was short, but I cannot remember who that was.
But since they didnt open the bag (it came sealed) in the presence of the tellers they would not do anything about it, or something like that.
Good luck if you give it a try.
Jim