I am in need of a replacement knob for the selector on the bottom left side. Evidently, the seam on my pant leg must have hooked the knob as I was getting out of my truck. I was hoping to find it on the floor, or under the seat, but I wasn't so lucky this time. I have looked at several places online, (including 3D print files) and haven't had any luck so far. I did end up stealing a knob from my 847, but I'm kind of in the same pickle since replacement knobs for that radio are made out of unobtanium as well.