Search the lemmyverse for the subreddits you are subscribed to on reddit.
gist.github.com
Search the lemmyverse for the subreddits you are subscribed to on reddit. - reddit_to_lemmy.py

EDIT: The script has been updated a few times. It now has new features. You should check it out again, even if you already have.

exactly what is says on the can. put in the multireddit URL of all your subs (explained in script), get a list of lemmy communities of the same name.