I have not.
As of 2017, all species in one way or another, are restricted or banned for export, including some rather common stuff in the hobby (pearls (banned) and motoros (restricted) to name a few).
I have a document from CITIES I am trying to figure out how to attach but it isn't allowing me to do so.
Basically in summary, the species that are allowed for export have a size limit the rays have to be under (30cm) and are limited to a certain quantity per year as allowed by the Brazilian Government.