Lovely Table Cloth Gareth, I bought original Subaru turbo gasket set on e-bay, you could make one out of klingerite or other graphite based gasket material but original is best
I never used gaskets as I was advised not to. I had both faces machined perfectly flat and bolted them up. My turbo guru (Geoff Kershaw of TT) told me a gasket was just something that will fail, he is right, why bother with it?