If you would like to write Brian, his address for the CTM is:
Elder Brian Roberts Brazil Maceio Mission Brazil Missionary Training Center Rua Padre Antonio D'Angelo 121 Casa Verde 02516-040 Sao Paulo SP Brazil
His address for his mission home is:
Elder Brian Roberts Brazil Maceio Mission Av. Dom Antonio Brandao, 333 Sala 402 Ed. Work Center, Farol Maceio-AL 57021-190
dearelder.com used to be an easy way to send letters. Now you must pay about $5.oo a month to do it for Brazil. You can check out their website if interested.