This something that used to be done quite a bit in the SEO world. Not sure if still holds and SEO value. Probably some, but maybe not the same level.

Anyways there are tools out there. I haven’t used them

But a tool like https://www6.waybackmachinedownloader.com/website-downloader...

Or

https://websitedownloader.com/

Should do the trick. Depending on the size of the site a small cost is involved.

They can even package them into unusable files.