Block/crankcase gasket

[Steve kay]

A summer of trying to deal with oil leakage has finally indicated that it realy is the less than happy relationship between block and crankcase that needs to be resolved. So splitting them to insert a gasket must be done sooner rather than later. So this is to ask for recommendation as to which supplier provides the best silicone gasket, unless there is another option that the wise heads of the forum might suggest.