Troba (hope you don't mind me shortening up your nom de plume. I can't type it without making errors), Hoser,
Yep, the POst Office vending machines here also dispense these. But they are still unusual finds. I guess most people don't like carrying (and therefore losing) them. The beach I was writing about is unusual in that I find them there frequently. Guess that a drop in sand is an instant loss and they need a handfull to feed the parking meters.