The Dept of infrastructure has already stated to me that they will send me a letter stating what the conditions of the importation were at the time.
They just said that they could not give me the original Import Approval as it was not applied for in my name at the time and seeing the guy that I shared the container with, applied for the Import Approval for my car and his has now passed on, then that's the best I could hope for at this moment.
I have asked the RMS if they could supply me with a copy. No reply as yet.
After the email that I have from the RMS stating that they have no issue with the conversion, I'm confident that there won't be a problem.