Hello. I have about 20 different sonoff devices. And three of them doesn't work from AC (from onboard DC works perfect). I made some diagnostic, and found, that iw1700 part was damaged (my mistake). I can replace this voltage regulator, but i can't find it in shops (ebay, ali, ) Where i can buy iwatt 1700 part? I need 5-10pcs for repairing. Or may be some analog?