Google Search;
https://www.google.com/search?q=antifaschistische+aktion+1933&num=100&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiwrqSfl8bTAhWhs1QKHdOoACMQsAQIMA
Check it out.
I came up with this on Google.
Seems they have a number of emblems that are similar knockoffs.
https://www.google.com/search?q=anitifa&lr=&hl=en&source=lnms&tbm=isch&sa=X&ved=0ahUKEwio65HnmsbTAhUl8YMKHQfyCtoQ_AUIDCgD&biw=1600&bih=805