Hi everyone,
Some of you would have seen the threads covering this at Saablink and at my site:
I have a replacement turbo, and might be able to use the cylinder head from my 1983 non-turbo donor car, but I don't have a replacement for the exhaust manifold. I've been in touch with Jak Stoll and he's rough-quoted around US$750 for a full-custom replacement exhaust manifold. That more or less matches the quoted A$1000 from Rose Engineering in Brisbane (here in Oz).
I'd still like to locate a good used OEM casting somewhere - eventually I will find one! However the idea of a proper heavy-duty custom-made exhaust manifold is quite attractive, despite the cost implications. Might be good for long-term peace of mind though.
Craig.