Saw palmetto tree scientifically known as Serenoa repens is native of Florida and grows all over southeastern United States. So it is not found growing naturally in India. It is generally grown as garden plant in India. Due to its medicinal importance the plant is also grown in Ayurvedic gardens. It would be better for you to visit the gardens of your locality in search of plant species.
As you have mentioned, there are lot of supplements available in the market. claiming various benefits for health.
I am also one of the formulator and developed some formulations.
Here, i am looking for the saw palmetto seeds and plants for the cultivation purpose. not as commercial plantation. just a home garden of medicinal important plants.