Spotted this in one of the local Dollar Tree stores, in the craft section:
![Jot Wood Magnet Jot Wood Magnet](profiles/pics/2021/802223a.jpg)
As you might guess, it costs $1 USD, and you get six hexagonal wooden pieces.
![Wood Magnets Wood Magnets](profiles/pics/2021/802223b.jpg)
The pieces are one inch from flat to flat, and 5mm tall including the magnet on the bottom.
![Wood Magnets (top and bottom) Wood Magnets (top and bottom)](profiles/pics/2021/802223c.jpg)
If you're looking for hexagonal bases, these would obviously do the trick. In fact, they're the same size as Heavy Gear bases (well, slightly taller due to the magnet), and you don't have to fill in the slottabase!
![Wood Magnet compared to Heavy Gear slottabase Wood Magnet compared to Heavy Gear slottabase](profiles/pics/2021/802223d.jpg)
The only bad news: These aren't listed on the store website, so they might be on the way out – get them while you can.