Sir FF CNG was never available with LXI or Eminent.
However, the same kit could be installed afterwards from Suzuki dealership for north of 60K Rs.
Eminent used to be imported in the first year and costs 1.6M Rs, afterwards it was produced locally.
Eminent was the best version as it has ABS, alloys, fog lights, DVD, 12V socket and a much better drive train and it was available for less then 1M for a very short period of time.
Regards