I do not think that anyone here would have model/past papers given for BA exams. However, I might be able help you to get a rough idea on the outlook of the paper and the basic questions asked in paper.
I sat for a banking exam in April 2014 and I can still remember the question structure of the exam. If you need any details, PM me. Please note that I have sat for only one banking exam and fortunately(or rather unfortunately) I got selected. So I have experience of only one exam.