nostr:npub1ktt8phjnkfmfrsxrgqpztdjuxk3x6psf80xyray0l3c7pyrln49qhkyhz0 had a list but i forgot the site
I host one on there too
Discussion
nostr:naddr1qqxnzde3xserjdfjxvurjvp4qgst94nsmefmya53crp5qq39kewrtgndqcynhnzp7j8lcu0qjple6jsrqsqqqa28tdea8t
Also available on GitHub: https://github.com/0xtrr/onion-service-nostr-relays