He does not have time to look elsewhere for a ship is the correct answer.
Explanation:
First of all, the narrator sets a short period of time as a deadline when he says <em>within two weeks</em>, which suggests a sense of urgency. The modal verb have got to also shows that the action is mandatory or necessary, increasing this sense of urgency that limits time to look for a ship in any other place.
The sentence from the paragraph best supports the conclusion that this paragraph belongs in the middle of sora's essay should be supporting the whole idea of the paragraph. It has to be coherent and precise that it may reflects the whole story of the paragraph.