as far as I know I don't think there are any specifically for FAs which is pretty annoying. I recently started Avoidant: How to Love (or Leave) a Dismissive Partner by Jeb Kinnison but havent' gotten far. The thing is with FAs is that we really are both avoidant and anxious and it can be easy to forget about one side or the other.
I think Attached is a good place to start, first. It's a good 101 and may get you to see some behaviors in yourself and others around you. I cried a lot when I read it. Once you have that down then start looking for more resources.
https://www.amazon.com/Avoidant-Love-Leave-Dismissive-Partner-ebook/dp/B00O4QLPHI
Ideal Parent Figure protocol.
https://www.amazon.com/Attachment-Disturbances-Adults-Treatment-Comprehensive/dp/0393711528
George Haas of Mettagroup is a good person to talk to about it.