Thank you David and Stewart. David's reply was my initial response upon seeing it, but like it said, some things on it just didnt quite fit (especially the lack of the red strip on the 12 marker)... Furthermore, the dial is damaged and touched up/repainted dials never quite look the same either...
The measurements are 30mm x 30mm which surprisingly is actually the size of the modern CW and CAW cased Monaco dials. However, the question remains as to why no one has attempted it yet.
Stewart - sadly it is my personal belief that Monaco's should be blue... So the re-issue grey vintage wasnt considered (as the prices here in Australia are far too high). Indeed the genuine is a better choice than a hybrid, so my instincts say just restore the one which I may be obtaining and just save my dollars for a blue 40th anniversary re-issue.