Is your IVA provider still trading ? They might still have a copy, depending on the actual timescale. Other than that, and it is a long shot, the Insolvency Service get sent copies on completion and might still have them archived.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk
Is there any reason why you need this after such a long time?
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk