Duster is the same like Rav4, tiguan etc...No transfer box.So except if you really want some interior fancy or specific brand i don't see the point going for higher priced competitors.
I took into consideration a model from Rusia called Uaz Patriot..It is meant to compete in Duster price but it have frame on ladder and transfer box.Is a full 4x4.Also it looks more like a duster than like an old russian Niva..
http://www.uaz.ru/models/uaz_patriot/ <--- this is translated from russian to eng..Some pages are missing in eng site..
http://www.uaz.ru/eng/models/patriot/specifications/ <-- this is the english only page
http://www.uaz.ru/models/uaz_patriot/integration/ <--- all models with prices too ...The most expensive costs 16.000 euro..The cheapest with gasoline engine is only 12.000 euro..
Dad told that the UAZ have big problems with finding parts and is not very good quality either (Russian stuff -- not that he drove one)..Unfortunetly by not being a mechanic myself i may end in trouble even with UAZ...
Also the UAZ Patriot in this video...
http://www.youtube.com/watch?v=lef3m3bx-YkI would have bought a NEW UAZ in no time if there weren't problems with parts..I personally don't know any UAZ distributors in my country either...A guy from my Off Road club that bought a Niva new told me that after 50.000km something begins to fall apart and you begin repairs...
This is the list of Distributors Network for UAZ:
http://www.uaz.ru/eng/customers/network/Regarding Lada Niva it does have transfer box but i am not sure about diff lock..