I think original nissan one comes with that same design... actually 2 DIn is fine... coz I want to fill up that space with something..i dont like to have an empty space under the single din CD player, so a double din one would be fine.. do you have any links?
Best would be to check some of the local second hand shops. Lots of people trade in stock head units for new ones, and sometimes there are gems which go for dirt cheap prices.