Alas, when I wrote to Supa Boondee (creator of the killer wave ghost repeller), they replied. Here it is:
thank you for your reply,
unfortunately our Boondee Laboratory has decided to terminate trisaksri ghost repellent out of product ranges. Now no more .. just history.
So, I guess they've gone back to their original plan of discontinuing their product. Alas, and we were so close to learning the truth about ghosts. And devils.
I guess it's back to the RF meter and digital thermometer for me...