I am looking for studies or papers that have combined the ACF with critical realism or who have realigned the ACF so that it fits critical realism (or at least tried to do so).
I don't know if it could fit your question, but an alternative approach to ACF is the discourse coalitions framework (refer to the work of Martin Hajer and following development). This framework surely follows a critical approach, whereas in concerned with power and hegemonic practices, but it rely on a constructivistic, rather than realistic, ontology.
Thank you Uchendu Eugene Chigbu for the suggestion. I missed that article and it seems very promising. I also suggest another Fischer's 2003 publication (2003, very good year) "Reframing Public Policy. Discursive Politics and Deliberative Practices". It's a book and contain a detailed explanation of the theoretical and epistemological basis of the discursive approach.