None of the suppliers we have on our list are based in Mumbai.
But - you can easily find the suppliers in Mumbia by going to Indiamart.com and specifying “Mumbai” at the top search bar, then searching on the medication you want - then contact the suppliers and see if your friend can just pick them up while he is there.
Note - what one person did when he purchased rapamycin in Turkey is to take it all out of the packaging and put it into a vitamin container. See here: