Mr Hammond.
Why do Andy and Jen never say "oops, we just broke that thing you really need but it's ok, we're going to use our super car/submarine to whip through time, space and size dimensions to get another one. Back in 10."?
Mr Hammond is in charge. They used to work in a museum. Surely Mr Hammond was the one who gave them the grand tour of Safari World and pointed out the amazing shrinkable car and submarine with wormhole capabilities.
AIBU to think he must know?