Lobster are shipped all over the world,trucks,planes,boats,etc.
They are hardly ever shipped in water,,,just like a live well in your boat,it would need aeration...expensive and just not needed.
Keep them cool(fridge temp) don't freeze them and moist...seaweed/rockweed is good so is newspaper soaked in salt water.
When there shipped on planes they go in cardboard boxes,trucks they are just in 120 lbs crates.
Look for some good hard shelled ones,with all there legs and claws because they can bleed out.
Even if you get home and there is few dead(within 24 hrs),as long as they were keep cool,they're safe to cook and I bet you can't taste the difference.
I think aplumma's method would work well.