Default [Q] Need stock firmware for GT-I9300XXEMC2

Hi Guys,
Need some help finding stock firmware 4.3 or 4.2 for Samsung Galaxy S3 International version Baseband version is I9300XXEMC2(Region: India). Currently i am rooted & running supernexus rom 4.4.2 KitKat version. I planning to sell it, so i need to get back to stock firmware. Please need your assistance in this