Respuesta a "The inside of my HTC Vive Controller charger fell out..."You would have to buy a new micro usb connector and unless you're very good with soldering and have a micro soldering tip it would be challenging. Finding the correct connector if you use your current one to look for which type you need. It looks like one with 4 through hole mounts and the standard pin out for the charger.
Respuesta a "Is there any way I could buy a replacement track pad?"Also apparently the steam controller uses a near identical track pad if you can buy a donor steam controller cheaper then a donor vive wand give that a try.