I only found it at http://www.albaspectrum.com/International/Microsoft/Great_Plains_Customizations_Brasil.htm.
For me it's odd, that they implement all ERP’s.Navision, Axapta, Great Plains, CRM, SAP Business One, Oracle E-Business SuiteI would rather contact directly Microsoft and try to get an answer, it's the safest way.
In Microsoft Brazil http://www.microsoft.com/brasil/dynamics/produtos/prod_navi.mspx there is a reference to Navision. But here isn’t a list of partners.
In brazil we have up to 5 MBS in Microsoft Navision. The 2 big wales are Fenix http://www.fenixconsultoria.com/ and CADIA http://www.cadia-consulting.com.br/brasil/index.asp. The company I work for uses Fenix as partnes, I would recommend them.