if you have a sunroof , then the inner is wasted too...
your best bet is to find a new roof, and switch them out... this would be a good time to do a big back window switch if you want that too...
I assume that shipping to where you are at must be astronomical...
another thing to look into, would be cutting the skin out of something that is around up there..volvo?saab?
the skin off one of those would have some crown to it, rather than a piece of flat sheet that has none, then use that patch piece on your roof, find an old metalworker to hammer weld it in for you. then you could just go with a cloth headliner.