Hello Aspirant,
Here is the given list of colleges for diploma course and Post Graduation course in banking..
1.   Ness Wadia    college of Commerce, Pune
2. MIMS Global Access School for Continuing Education
3.CZ Patel College of Business and Management, Anand
4. SCDL, Mumbai
5. AICCAR Business School, Mumbai
Go for list of courses and schedule of admission by visiting official website.
Thank you