So one halloween season around the turn of the millenium, I spotted these cool plastic coffins in the Aisles of my local Wal Mart. They came in a six pack with 3 different colors. It was only that year that they were there, and I've never found them anywhere else. But they fit Micronaut figures to a T.
I dream of finding more some day at some party favor or big box store, and I check every year, and every place I can think of. So far, nothing.
Check 'em out: