I know someone with past experience in VO and he is an English-to-Portuguese/Portuguese translator of written materials. He lives in Sao Paulo. I have sent him your request and will let you know if he is interested. I will then pass along contact details. Please specify: Portgual dialect or Brazil dialect?
I'll get back with you.
Assuming you are also looking for someone to speak in a Spanish commericial, I can easily accomplish that. I learned and have practiced Spanish since 7th grade. The question I have is: Castillian or a regional dialect?