They (like other Indian heritage liquor producers) don't export abroad.
There is large enough demand for heritage liquors in India that there isn't much of an interest in dealing with customs.
Most Indian liquor abroad is exported by a couple specific conglomerates (Radico Khaitan, Mohan Meakin) that fell out of favor after 2013-14 because they were close with the Samajwadi Party, and thus pivoted abroad as they faced issues domestically. The liquor business is VERY dirty in India.
