Translations can be ordered directly from sworn translators as well as in translation bureaus
A translation can be ordered directly from a sworn translator as well as in translation agencies which act as intermediaries between clients and translators. Note, however, that translation agencies will charge you for that, so the price for translating a document may be higher than in the case when you order it directly from a sworn translator.
Detailed instructions on how to find a sworn translator can be found here.