All of the images you'v posted are actually of 20th C types. Prior to the introduction of Wolseley pattern helmets, most pith helmets worn by men or women, military or civilian of most countries, were not the wide brimmed types we are most familiar.
Tony at Antheads.com casts some Victorian era types in resin; The most commonly worn type at the time were the British Foreign Service Helmet, but probably the one you would like the most would be the Wolseley pattern, though this only appeared in 1898. http://www.antheads.co.uk/catguide/helmets
BTW, your last image is that of the Indian made "Sola Topi" which only appeared in the 1920's and was worn by British troops in hot dusty places until the last British soldier left India in 1947. As an interesting historical note, when a British battalion or regiment left India, they would keep their topis until the ship passed Cyprus, which was the point of no return. The battalion or regiment was then assembled on deck, and on command, as one, flung their topis into the sea.