I suggest you to take Audit Classes of Arti Lahoti Ma'm of AS-Foundation Pune. She is a very good teacher and finishes entire syllabus in 35 classes. However, if ur attempt is in May, then, you can take SA's & Co. Audit lectures of Ravi Taori sir from caclubindia.com.
You can also check edupedia.com where free lectures are available for Law & Audit - CA Final. If u want to give even more lesser time, then, you can watch e-lectures of ICAI on SAs (Sidharth Aggarwal Sir), they are very useful.