Are you talking about the outside roof or the interior roof lining bit?
If it's the whole roof, they are so easy to get, just go to a wreckers and find one that is in pristine condition, and take that one, otherwise look in the Quokka for second hand wrecks and you can get one like that.
I just recently had my roof taken off and destroyed and a new one put on because it had so much rust in there, it was disgusting.
It's great now.............i fully recommend gettinga new roof put in there.
Follow Your Dreams......RIP Brocky 1945 - 2006......May God Rest Your Soul