My Tj is a 97. It came from the factory with no A/C so I have the slider controls for the heat. One of my knobs is missing and I have been to the junk yard a couple of times and found nothing that will work. I have seen entire heater control panels on ebay but don't want to spend $100 or more just to get a knob. I was thinking that this would be a perfect job for a 3d printer but checked that out online and from what I see that is even more expensive than buying the control panel. Is there anyone on this forum who has a 3d printer who knows how to do this or give me another idea besides making a wooden knob and epoxying it on.