The site I do customer support for sells Nexium 20 mg and 40 mg from Costa Rica. They only sell the brand-name stuff, so I'm sure it's going to be a lot more than any price from India. You can check out the prices at www.horizondrugs.com.

Also, shoprxonline.com sells a generic of Nexium from India pretty cheap. I couldn't vouch for the quality of product or service provided for that site though.

Good luck in your search -- I hope you find what you're looking for.