Well I'm a happy bunny. Both Restorer Ultimate and R-Studio saw the iso's with their true size. see image attached. What was interesting is that both bits of software looked very similar they carried out the scan using the same method and ended up with the same result. So I took an educated guess and bingo both are by the same company:
BitMart Inc. 9251 Yonge Street, Bldg 8, Suite 203 Richmond Hill ON L4C 9T3 Canada
Restorer Ultimate Pro was $49.99 (£30.00) while R studio was $79.99 (£48.00) so I took the plunge and bought the Restorer Ultimate. I then attempted to perform the recovery of the scanned files. It
was telling me a day to restore so I done it overnight. This morning I now have a folder with 100 fully recovered and WORKING iso images.
Well I have learned something here and I hope that others who find themselves wrestling with the same problem as I had can look at this post and get a definitive solution, that has been tried and tested.
So Well done to BitMart who have produced software that out performed all the competition.
Thanks to everyone for their input and help.