CJ Allison I figure you are looking at the 3.5mm purple connectors. Some places list them as 3.5mm audio jack others strictly as 3.5 mm phone connectors. Not sure where to get the ones that are originally intended for your circuit board but you can replace those with other ones. The main issue is going to be dimensions and location of the contacts. Get some calipers are equivalent and measure the connector. The go check with places [https://www.mouser.com/c/connectors/audio-video-connectors/phone-connectors/?gender=Female&mounting%20style=Through%20Hole&number%20of%20positions=3%20Position&standard=3.5%20mm%2C%201%2F8%20in&termination%20style=Solder|like this.] There might be some that will come close to the size you will need but it should be doable.