Thanks for the link AN5590

More research shows you can pretty much get an off the shelf kit now for $2300 that uses a controller that fits in the original HVAC control position AND the claim is you dont lose any Glovebox!

The controller fits in the same position and looks like:
IMG_8039.jpg

The supplier also makes a blanking plate for the engine bay when you remove the factory blower unit - so actually cleans up the Engine bay

You also will retain the fresh air vents if you wish to.

I'm starting to lean this way, as it looks as original as possible
Previous options seemed to leave control in the dash that didn't do anything...