Dun understand the theory behind this unless you are running some fierce compression mod but you could try your luck at accessories motorspots shops in Sunway. Else, internet order loh. Good hunting.
There are 2 types of metal head gasket :-
1) high compression - the thickness is lower than the original
2) low compression - the thickness is higher than the original
Depending on applications either one can be used. The advantage of metal head gasket is that it is reusable.