Any grocery or department store. Find the area with the diapers, and wander around looking lost. When you find a likely victem (big belly or very little kid will be a dead give away), approach apologetically. Ask.
The sheepish grin will help.
Use the same techniques when buying feminine hygine products for the FAK and fire starting.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.