Alright guys, I also have been searching nonstop for these things. Can't find them anywhere. I have 3 of them but 2 of them stopped making noise. They went swimming on a warm day of fishing. I made a few phone calls to Frabill who got me in touch with Plano (Frabill is a subsidiary of Plano Molding). Just got off the phone ordering 3 of them for about $50 every thing included.. They are $12.99 each + tax and shipping. They ship via UPS 1 day delivery. Phone number is 800-558-1005. I highly recommend these as they are the brightest, loudest, easiest to set up tip up alarm I've encountered (and I've tried many).
You're welcome!
-Myerchinize