This Skin done with popular demand in the forums for IAF skins. This one is from 15h Squadron, the "Flying Lances"
edit: corrected tail flag
Install as usual in the saved games folder. for example..
Place the unzipped folder in C:/Users/your computer account name/Saved Games/DCS/Liveries/MiG-21Bis/
Note if you donot see MiG-21Bis folder in Saved Games/DCS/Liveries then create one.
If you donot see the skin in mission editor then goto weapons loadout page and sel ect India as country then select skin fr om the dropdown.