Hi you can visit to places for the Cupboard.
1.INDIA Steel Almirah - Its good you can get details from the link -https://www.indiasteelalmirah.co.in/index.php
2.Guru Nanak Engg Works - its having so much options for you. Address (Ravi Nagar, Vishnu Garden, New Delhi) (Number-098107 60908)
3.Siddhart Steel Furniture - Its cheapest for you. (Address -Sitapuri Part-1, Gali no-16, Opp.C-2, Janakpuri, New Delhi, Delhi 110045) (Number -098109 22345)