Hi, below are some schools and universities I think you should consider.

• Elite IAS Academy, New Delhi.
• ALS IAS Training, Thiruvananthapuram.
• Sarat Chandra IAS Academy, Vijayawada.
• Nimbus Academy for IAS, Chandigarh.
• Chinmaya Academy for Civil Services, Anna Nagar.
• Budania IAS, Sikar.
• O2 IAS Academy, Chandigarh.
• Sathya IAS Academy, Chennai.

Hope this helps.