Hello!
I was not able to find much that explicitly dealt with anarchism and Habermas or civil society. You also might want check to see if your library has the Alternative Press Index, they index articles from leftist/radical periodicals that a lot of the other databases/indexes do not cover.
If you are interested in knowing more about Habermas I found this web site with a ton of links to information about Habermas.
Here, Murray Bookchin (a social anarchist) discusses Habermas in "Finding the Subject: Notes on Whitebook and 'Habermas Ltd.'"
Here is an article that mentions Habermas in a discussion about postmodernism and anarchism.
I searched for articles and books in several different social science databases. Since I would describe Habermas as a social democrat, he does not seem to deal with anarchism very much in his writings. Here are a few articles that might be of interest to you.
*These are abstracts (a short summary of the article), so if you want the article you are probably going to have to go to a library to get them. These journals are probably going to be in academic libraries, so if you have access to one I would try there first.
Abstract Decision-making processes within environmental social movement organizations are analyzed with reference to principles derived from the communicative rationality of Jurgen Habermas. Habermas can provide normative grounds for consensual decision making, & analytical tools by which one can judge existing practices. The radical environmental organization chosen as an example of such analysis is Earth First. But insight is also given into the operations of more hierarchical organizations such as Friends of the Earth. Organization theory can be used to show how these two different types of organization legitimate themselves in order to acquire resources from their environments, & thereby effectively engage in their chosen activities. These differing needs & structures impact upon their respective decision-making processes in certain ways. Overall, while FOE is less able to put communicative rationality into practice than radical groups, the difficulties it faces here can potentially be overcome. Both organizational forms can therefore be constructively analyzed using the principles of communicative rationality. 57 References. Adapted from the source document.
I also found two books that might help with the civil society and anarchism question.
*This is a Ph. D. Dissertation so getting your hands on it could be difficult. But it looks like it could help you a great deal.
I hope that this helps
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Jonny