For the fiberglass dash top (6 dial type), blank gauges fascia and bonnet skin you could try Geoff Wade on mob= 0417369996. He's outer SE Melb. suburbs.
I've used the dash top in my car. It requires some light sanding on the edges to eliminate the high spots to give a snug fit. Not so important if you get it padded or flocked.
re head lining bows, do you know if mk1 & 2's are the same? I have some but not sure which they are. I know the roofs are different curves but I'm not sure on the head lining bows.
Perhaps somebody else could comment on this SFE