If you find an SL/E Gemini these have remote control mirrors, sort of same concept as the HQ-HZ style. It is fiddly but all the guts, cable etc fits into a WB Kingswood driver's side mirror and the remote control knob sits in the same place it does on HQ-HZ. Works a charm. Just requires a big hole in the door under the WB Kingswood mirror, same as HQ-HZ have for the remote mirrors.