I couldn't find on eBay in the usa. I'm not sure where you can find in Brazil. Maybe "mercado livre" has something there? You can see the process here: https://www.youtube.com/shared?ci=fPg5MpwKq3k

I've found this very interesting. It talks about how to do it. They say it's very dangerous and not for sale hehe http://www.capturedlightning.com/frames/lichtenbergs.html

I made mine out of a transformer from a microwave, just youtube how to make a lichtenberg device. Be careful they can be dangerous!

Thank you for the tips Justin! This is really awesome!!