invoice

I am looking for a freelancer specialized in accounting, tax support or business support to help me with a problem regarding a previous project. I need an invoice for services (not products) from a REAL company based in one of the following countries: Anguilla, Bermuda, Bahamas,Virgin Islands (British),Turks And Caicos,Nauru, Palau or Vanuatu. (Alternatively, Guernsey or Jersey). The services mentioned in the invoice should be related with internet, software, research, development of digital project or digital media. Imporant note: That invoice should be backdated because it's important to cover another invoice that was paid to a company in Asia last year. And despite my effort it's impossible to locate the company now, contact anyone (no phones, no site anymore!) or at least find a way to trace the people behind that scheme. And at this point there are a series of problems to deal with with many stakeholders; books and balance sheets are only the first ones. I am willing to pay a fixed priced for that service, plus any fees applicable.