As I recall (from an ancient APUG thread), Brazil has ridiculous import tariffs. So while shipping a kit in is probably physically possible, it might be prohibitively expensive. My guess is that the OP would hope to source raw chemistry far cheaper than a kit, despite the high tariffs.
I personally use the Fuji 5L kits from Ag Photo in the UK and have them shipped to AU. Comes out to about $200 for 50 rolls, but that's 1/3 of the price of walking into a lab and we don't have import tariffs on photo chemistry except 10% GST on packages over $1000.
It is true. Import taxes doubles (actually, itīs a bit more) the price of the good + freight. And thatīs why we are trying to make our own chemicals.