Actually there may be less than 40 profiles containing the defunct link.
A method to find profiles with particular content:
1/ Log on to SiteComber.com
2/ Enter in the “For” field your target text, in this case you would enter: kangarooislandpioneers.
3/ Enter in the “Within” field your target website, in this case you would enter wikitree.com
Of course, those familiar with the intermediate methods of search engine queries will get their results without the use of SiteComber.com.