I have quite a few Z5 air-tites for sale. I purchased these from CoinSupplyExpress btw, so these are the 'real deal'. These were made for the 5 oz America the Beautiful silver bullion coins.
Inside diameter is 76.8mm (3.024").
Outside diameter is 82.91mm (3.264").
Depth is 3.84mm (0.151").
They will be shipped unassembled with protection.
They come in quantities of 10 for $18 each incl. delivery.
Payment by PayPal, check or money order.
Here are a few example photos: