For my work I find myself living in many places (4 continents in the last 5 years). Some of these have limited / no access to postal services or even web access. As a result getting film can sometimes be hard. I need to rely on either asking someone to bring it for me, or I buy some when I am passing through a larger town.
So I need input from people for what B&W film is most easily found throughout the world. It would need to be easily bought by someone who is not a photographer. I would be looking for:
1) A film of around 100/21 ISO
2) A film of around 400/27 ISO
This is all so I can standardise on a film I can get consistently.