Well, my box of pachinko machine parts arrived -

Heck, that's what it sounded like at least to me.
I would talk to Marry Beth about being a good source for the plastic coin tubes. The coin sizes seem to be about the same, so there should be no issues about finding something special.
The tubes do double duty - keeps them from rattling around and getting dinged up.
I wonder if the standard silver eagle money clip would hold this coin. Would be nice way to show it off to others.
Another good option for shipment would be just to use a bit of card board, tape the bags of coins to the cardboard and it should be good to go. to prevent the items from sliding around - some newspaper to pack the box/container.
If there is an option next time I order these coins I would be happy to pay extra to get the coin tubes.