Teak, like Rosewood, is an impromptu trade name for local tropical hardwoods which vaguely resemble the original. Indian reproduction arms are marketed on price (without compromising safety) and so use economical hardwoods available in the local market. Usually the same as available to the furniture trade. This is one of the ways they keep the price down. Were they to use specific accepted gunstock woods like walnut it would be far more expensive.
If one wants Pedersoli and custom arms quality of finish then expect to pay Pedersoli or custom prices. You pays your money and takes your choice. How else might one expect them to charge less money? Or do folk want to exploit the workers by having their wages reduced?
If one objects to the Indian stocks then dig deeper in your pocket. If you cannot afford to pay more then make do with what you get.
The enthusiastic, but impecunious, might want to have a go at making their own stock to take the Indian metal. At the worst you still would have the original stock to use of it all goes horribly wrong. The Indian stockmaker may be more skilled than you, but he is on piecework so was in a hurry. You have all the time you might need to work carefully and slowly.