English-Spanish Legal Doc Translation

I have a Word document that contains formal legal language and official references, currently written in English. I need it rendered into flawless Spanish while keeping any registered names, statutes, or fixed legal terminology in English whenever that preserves accuracy... (Budget: £250 - £750 GBP, Jobs: Editing, English (US) Translator, English Translation, Legal, Legal Translation, Legal Writing, Spanish Translator, Translation)