I went through the same process with my Coupe. I do use it for business and so wanted to have something I could use as part of my Apple bubble.

I looked at a 1DIN bluetooth head unit for volume knob and amp. I was then going to use my iPhone via Bluetooth and just run everything on this. I don't use the radio that much and the head unit could provide that much. The rest came from the iPhone which was on a Mag-charge mount for power and safety/compliance with the road laws. I do this in the Mercedes and it works great.

The second approach was a hidden bluetooth amp driving the speakers and the iPhone just linked to this directly. Again a mag-mount for the iPhone on the dash. The issue with this is volume levels as the volume buttons on the side of the iPhone are not practical to use when moving so without the modern steering-wheel controls or knob on the amp it did not really work.

Given how small the windscreen is and not wanting to obstruct the view when driving I looked at having an iPad mini just for the car. Your Apple account allows things like "answer call on iPad" so this works for bringing it through the car kit. I found some mounts that fit to the front bolt on the seat mount. A pole and then a swan neck adjustable section allowed me to position it out of the way but high enough to be in line of sight. At that time I could not find a mag mount charging solution so it would have been a bit of a rotter constantly taking it in and out plus the charge cable. But the iPad Mini screen was a great size for sat nav and big buttons (adjust the button size in settings) and it slaved to the iPhone so no need for 2 SIMs etc.

Many of the Coupes did have an amp fitted, it took ages to find mine and it is not what I would call an upmarket unit.

I have a good picture of the front door speakers that Ale72 sent me.
I can send you a photo of the Floater I have fitted for interest (by DM to avoid having a contract taken out on me) if you want. It does work very well.

I am not to far from Bucks if you want to swap notes. (A34/A303 Junction)

Everyone loves a Morgan. Even me, unless it's broken again.