Hi,
I am also based in India , Pune. In every Indian city you will find an area that deals with stuff used by cobblers & shoe /chappal makers. This area will supply you with most basic stuff. In Mumbai, near Sion railway station there is a big leather goods manufacturing area . You can get most of the stuff from there. However, you will not get a fraction of the stuff available with shops like Tandy's. Best option is to import it from the US or ask some friend to bring it along.