I asked my friendly local parts man (not NAPA) seeking such a spacer and we could not find one. We could find new gaskets for either side of the spacer but not the spacer itself.

I have another local source that may have such a spacer sitting around.

I tried Carbking's starting method linked in his reply to my initial query and it did help. I would still like to keep all that gas from getting down into the engine unburned.

Remember 9-11-01--God Bless the USA
JUSTICE, not REVENGE, will prevail

1951 Chevy 1/2-ton Pickup truck