I was looking for a 27mm Star Wars Legion base that was the same dimensions as the game bases and that works well with magnets. All other bases that I found online were either too short or too tall or had engravings on them that would be incompatible with magnets.
I created my own design that works well with 5x2mm N52 Magnets.
Add a drop of super glue and insert the magnet stack in the hole. Then just slide the stack to the side and proceed to the next base.
Works well with N52 magnets from Aliexpress.
The author marked this model as their own original creation.