Several years ago I was researching an alternative to the typical Hartwell H5000 access panel latch.  Someone here told me about one that did the same job but didn't require that semi-keyhole-shaped cutout for the latch button and mechanism.  The laternative latch required a single round hole for its actuating button, and when closed the circular button rested flush with the surface of the access panel.  If you have any information about this latch mechanism I would appreciate getting a refresher on it, as I can no longer locate the original data regarding manufacture and source.  TIA for your help.

   <Marv>