I made it back to the Makerspace after a few weeks off. Tonight, I took a spool of white PLA filament and printed five (5) bases for the wobbly chess pieces. This took about 2.5 hours and was all the time I had tonight.
I'll take the pieces home and glue them to the top pieces that I printed before. I need to figure out a good weight to put in the base to make them stand up. The Thingiverse instructions says to put in five pennies. I'm going to try lead from Pinewood Derby cars.