For the availability, we would suggest you walk into the nearest dealership as they will be the better person to assist you because it depends on their stock book. You can click on the following link to see the details of the nearest dealership in Gandhidham - Renault Showrooms.
Yes, you can technically upsize the front seats of a Renault Kwid, but it's important to ensure compatibility with safety features like airbags and seatbelt alignment.