I have come across this name for alloy wheels brand for the first time, but while researching for more on Google. It incidentally displayed an option “Rays Alloy wheels for 350Z”. So I’m assuming that it must be some branded manufacturer. They are Japanese based BTW. And maybe this is their official website: RAYS
Possibly they do not have an official retail outlet in India. Most of their alloys are manufactured for sports cars. You might have to find someone who can import them and check if the ones of size of your car are available. Still, this is just a guesswork. I shall keep you posted if come across any solid details further.