The Thai Royal Cat, also known as the Khao Manee, is a rare and expensive cat breed. If you want to purchase a genuine Thai Royal Cat, you should go through the following channels:

Certified Breeders: Find a certified breeder who specializes in Thai Royal Cat breeding. These breeders often join professional cat breeders' organizations and follow strict breeding standards and ethical codes.

Cat shows and competitions: Participating in cat shows and competitions can expose you to high-quality cats of various breeds, including Thai royal cats. At these events you can communicate directly with the breeder and have the opportunity to see the cats in action.

Professional cat stores: Some professional pet stores may sell Thai royal cats, but you should make sure the store is credibility and the cat’s health certificate.

Online platforms: Some online pet sales platforms may also have Thai royal cats for sale, but be careful when purchasing as there are many false advertisements and scams on the Internet. Be sure to verify the seller's credibility and the cat's health, preferably by viewing the cat in person, such as through a video call.