Hi Crawling Chaos,

I'm not sure if you know https://supermagnetman.com/
They have a good selection and I've bought from them in the past without problems.

I don't know how often you have courier coming to Brazil, but I'm here in Sao Paulo and I have used a "middleman" in the past. I'm not sure if the guy is still active, but it worked like a charm in the past. Drop me a line PM if you think that may work for you.

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