I just went down a rabbit hole. So I'd have imagined that the facsimile edition would be available digitally.
https://www.amazon.com/Hobbit-Facsim.../dp/0007440839
But no, it isn't. I googled for it, I even looked at the ....archive.... but nobody seemed to have scanned any of the first editions, like ever.
However, as only the riddle was changed, you can just McGuyver your own version. Here's the only difference with the changes for Lord of the Rings:
https://web.archive.org/web/20190407...t/riddles.html