Report "I have a wireless doorbell Model SL4195 -RX. I replaced the battery in the button part once and now it has quit again. This time I replaced that again and also the 3 batteries in the chime part and still doesn't work. Can I get a new small ringer that will make it chime again when you push it? One store said they carry some brand --not Desa but were out and another store said you had to get one on the same frequency as the chime. Can I get one someplace? Ace hardware is where we bought this about 7 years ago and they no longer carry them. Thanks for your help"