Hey, some mongers are embarrassed to even nod at another monger in an AMP. But I can see it. Some of those Japanese stores have kids running all around so may seem a bit funny to ask. But to each their own.
If okay to accept packages, Ebay works. Prices are $8-$12 a pack including shipping depending on how many packs you buy and where they ship from. I think there were even some for $7 a pack with free shipping from Hong Kong but not sure I would want to wait that long, etc. Each pack has 3. So prices are a little less than $3 to $4 a condom. Not a bad investment given the amount each visit costs.
Happy Hunting