This hits close to home.
When Grayson's _Traditional Archery from Six Continents_ https://www.goodreads.com/book/show/1662236.Traditional_Arch... went out of print, I actually found it more palatable to buy the rights and re-print it.
Since then, I attempted that with Tolkien's _Old English Exodus_ but was rebuffed on the grounds that I was a "Tolkien Nut" and not an academic --- that text has since been reprinted by Harper Collins in a #2 box set, which I anxiously pre-ordered and waited for, only to find that from the Select Bibliography to then end of the re-set poem (22 pages) there were almost as many typos (20) on a quick first reading:
https://old.reddit.com/r/OldEnglish/comments/1vyly9o/could_s...
really wish all authors did as DEK and offered a bounty on typos... I could use a check for $51.20 even if it wouldn't fully offset the cost of the boxed set (though arguably, I should sell the other 4 books as dupes of texts I already own).
Not so fast...typos are now proof the content wasn't AI generated. AI doesn't make typographical mistakes except when languages are mixed.
Wow! Good on you for finding the rights and republishing! I would love to read more about the process.