Plantation Pie?

My grandmother is pining for a '40's confection which she remembers as "Plantation Pie" -- two chocolate-covered graham crackers with marshmallow between. My father remembers the next generation of the cookies as "Marshmallow Shockabsorbers". What the heck are these things?

As far as I can tell, plantation pie can refer to almost any type of actual pie, sweet or savory, with little linking the recipes together. I could find no trace of Plantation Pie as a trade name for a cookie.

A search on marshmallow shock absorber, on the other hand, basically turns up bras.
Is it as simple as the venerable Moon Pie? It is a marshmallow sandwich. It has graham cracker cookies. It is dipped in chocolate. There are both normal cookie-sized versions and hockey puck versions. It was invented around 1917, so was definitely around in the '40's. It tends to have a third interior cookie, but I think that is a later addition.
There aren't many other possibilities. Nabisco used to make a "marshmallow sandwich", but I think it is post-War origin.

If it is actually a Moon Pie, there are recipes available online. But they should also be at every supermarket and convenience store in California.