How to get the Financials of Proprietor or Partnership Firm

Dear All,

I would like to get the Financials of certain firms or Proprietorship, but unlike companies they don't have ZAUBA CORP or MCA21 like websites where we can get the details??

I would be requiring Balance Sheet & Profit & Loss of them, please help me??

If anyone has any idea as to from where we can get the details of this type of entities please advise further??