I have a 57 Bel Air 4 door post sedan with a recirculating heater. The chrome in-dash control is pretty simple. It has 2 knobs, (not sliders). One is a twist knob, multi-position for the fan speed and the other is a pull knob for defrost. That's it. I would like to replace the in-dash chrome control face plate but it seems none of the main stream 57 parts suppliers stock it. Anybody know of a supplier which sells them? Plan B would be to convert it but not sure what my option is. Suggestions in that case? Thanks!!