i went by a aprasal website yes , i no don't scream so do millions newbies.
I dig around with wayback looked kicking 2015 - 2017
how will you get back the tumblr oregnal info?
what i think is best is make a really wicked front page and thrn scrape every link possable relating to that website , then setup a database of the links you found , then use that database to show them links ....
if not get the socail back working.
I guess if you can get all the links you might be lucky .
I have not gone thu hreff and others just quick look
scrapebox will do everthink you need on this easly ...