Slant 6 cylinder Aluminium engine

Hi and thanks for the help, the high comp. pistons were installed because when the cylinder head was ported and bigger valves were installe the compression drop, and its now slightly above the original, maybe that that caused the problem,
But the engine runs well but it have some radiator fluid in the oil pan, and i dont want to take off the cylinder head before ill have the gasket.

Hope you will understand my poor english.
So the problem is still the gasket, can anyone suply it or make it?

Best reguards from an sunny Sweden Michael