Hello, Matheus.
I believe it is no longer possible to obtain XOA.
Since I opened this ticket I haven’t gotten any support from Samsung on this, neither on this channel nor through other available channels.
It’s worth mentioning that HP, which now owns Samsung’s printer division, do not knows what to say about the XOA.
In short, it seems that XOA has been forgotten and kept under lock and key so that no one else has access (infortunately).