Hello,
I'm reaching out because I feel that I can help support you in your efforts to establish NAP local citations. Throughout my years working in the Internet Marketing Industry, I've compiled a document of 43 domains and login URL's to local directories. These are all US based, with high domain authority, and are not included in Yext.
I'd be happy to share this document with you, as you mentioned implementing these links yourself. Let me know if this is agreeable to you!
Sincerely,
Kathryn Kinlaw
Digital Marketing Specialist