I know this is an old post, but for anybody who stumbles onto this post while searching for a way to do this, there is now at least one option available here:
Lately, I've been messing around with the alarm status table in my spare time for fun, and in doing so, I've developed a way to produce larger checkboxes. In reality, it's just a simple overlay that adjusts the row height and column width to accommodate whatever size checkbox is specified and then paints the larger checkboxes over the originals. Listeners are used to repaint the checkboxes whenever they are clicked or when the table model changes as a result of filtering, sorting, or alarm state…