That's interesting. I've never seen disc magnets built like that - typically the poles of the magnet are the top & bottom surfaces of the disc, not splitting it vertically. g.
Hi Gene,
In the past, I've managed to acquire some from Supermagnetman, in Birmingham, Alabama. (... had them shipped to a friend in TX, who, when visiting, brought them to Brazil, where I live. Now, the company has international shipping)