That’s the hard way to do it!
​
Try this strategy instead:
Run a broken outgoing link checker on a top authority site for your niche.
Find the linked sites that have ceased to be online, or have removed the pages.
Select the pages with most incoming links(more the better). Some 404’s have dozens or even hundreds of links.
Re-create the page with re-written unique content – make the page AWESOME
Reach out to ALL of the sites that linked to the broken site/page:
“Hi Siteowner, I noticed you are linking to a dead page which is not a good experience for your visitors and not good for Google. You may like to consider linking to this AWESOME page instead”
Offer them your page as an alternative for the target for their link.
That strategy means you already have sites who may be happy to link to you BEFORE you create the page.
In addition, you can then outreach to other sites who may link to your page roundups etc