Hello there. Hope you are doing good. I would like to tell you that IIMs do have a scholarship for PWD students. It is the scholarship awarded to meritorious PWD students, whose family income does not exceed Rs 6,00,000 per annum. For more details you can visit :

www.scholarships.gov.in (//www.scholarships.gov.in)

I hope you found this answer helpful. Good luck for your future.