I was looking to visit Christmas Island during my year off. I went to the U.S./Australian Visa requirements, and found the following companies listed for Travel Insurance and those traveling abroad. Just thought I'd share.
TLDR : Answer Summary
The post discusses travel plans to Christmas Island and mentions checking U.S. and Australian visa requirements, along with sharing information about travel insurance providers. A comment clarifies that Christmas Island is an Australian territory and thus subject to Australian visa regulations.