You could try and make one up yourself with some cable from a wreckers. If not head down to repco and ask there, they can get them made up for you (or at least know places that do).
Thanks for all the interest. My car has its fuse box cover also.
Well you lucky bunch have the opportunity this week only to meet the guy that bought it off the grandma. Nev's friend, Cambell, is in Sydney this week. He owned the car for more than 10 years and knows it back to front. I think he is going home to Melbourne next weekend, so if you want to have a look at the car I seriously reccomend doing it while he is here.