Check u pick it in Prescott. All of the Chrysler vehicles from the TJ era shared the same radios. Though I don’t think any of them came with an aux jack.
Another option is a GROM adapter which is what I've been using. This thread (https://wranglertjforum.com/threads/anybody-know-a-good-bluetooth-modified-radio.52059/) has some questions and answers about them. I use a bluetooth version because I like the wireless connection. You could check their site to see if they make a wired aux version to save some money if you don't want the bluetooth. These plug into the smaller port on the back that's normally used for a CD changer or SAT radio.