AC Delco sells just the coolant bypass gasket. Look on their site.Thanks, I went with FelPro and it comes with all that, everything BUT the $%^$#@ side cover gasket. Heading up to Advance, will pick up some form-a-gasket and see how it works. Still have some cleaning of the LIM to do, must have never had the PCV changed, the inside is coated with oil.
Read an old post by Bill and also did some porting of the coolant channels at the crossover right below that cover.