You can get a replacement final order by contacting the Court that issued the original.
The copy of your final order will cost £10 if you can provide your case number or £45 if you don’t.
A copy of your final order can be requested via email or post, which must include your name, the case number, your address and how you would like to pay. A cheque or postal order must be payable to HM Courts & Tribunals Service. You can also pay by card in which case you will need to provide a phone number in your letter or email, for the courts to call you on.
The following link will help you locate the right court and its contact details: https://www.find-court-tribunal.service.gov.uk/
In the event that you don’t know which court issued the original, the fee will be £65 and you will need to fill in form D440 and send it to the address on the form.