In simple words
NO conversion is just a headache and nightmare
I would suggest to sell off your Alto VXR and buy an Alto VXL AGS. Converting it to Automatic or AGS would not be feasible at all. Absolutely not recommended.
Own Experience
My cousin have Alto VXR and we checked with Suzuki last month. They said if we start conversion nobody will buy AGS ,many will buy Manual from us and then convert it from us.
So he said suzuki dealer will never do it and also
void the warrenty