There is an Indian / African place near Altstetten station (on Hohlstrasse) - tram 31 from Zurich Bahnhof (200M before the railway station) - which will probably satisfy your needs. They also do some strange fish there - fresh off the plane. Also just next to Oerlikon railway station is a big Asian supermarket.
Sometimes the price is not so important . it is more a matter of what you want and where you can get it.
But there are so many places in Kreis 4 (Langstrasse within 2 minutes of each other) as the previous poster said - should not be a problem to find what you are looking for.