I realized I didn't need actually it anymore, I found another way to find all my content using the pushshift torrents, see https://kbin.social/m/RedditMigration/t/47320/PSA-If-you-have-more-than-1000-posts-more-than - and once I had a copy of that I had a copy of the permalinks/ids i needed to delete/overwrite everything.
Note though that this may not be true of everyone - for example if you want your saved posts beyond 1000 (and these saved posts aren't your own or ones you commented on) then the above trick won't help since pushshift didn't have the saved post information.
Ironically it's been so hard to get ahold of an admin recently.