I received some good technical information on integrating the mirror function. Unfortunately, it is not good news for my project. Here's a summary of the parts needed and the work required:
1. Replace the mirrors with ones equipped with the memory function. Standard electric mirrors are no good. You can tell by the number of pins on the connector. The memory function (and heating) requires 10 pins has. The standard electric mirror has 5 pins.
2. Install pins on the connector, get memory mirror pigtails from a breakers yard or even a whole new door loom. The big connector at the door that separates the door loom from the main loom doesn't have the pins needed either, so adding pins to that connector is needed, or you have to run the wires as one piece down to the driver seat to the control module.
3. Make the connections for the mirrors in the control module under the seat. The connections are very simple once you have the wiring from the mirrors in place.
There are 9 wires to run to the drivers side and 5 to the passenger. On the driver side you need +5v, system ground, left/right, up/down to go to the mirror. there is also left/right drivers, up/down drivers, left/right pass and up/down pass to go the the mirror control switch. There is also a common motor connection that runs to both the mirror and the switch.
On the passenger side you need +5v, system ground, left/right, up/down and the common motor connection. It may be possible to eliminate the common motor connection on the passenger side, as it is likely already there. If you want the passenger mirror to tilt when in reverse, you will also need to run a line from the 24 pin connector to the reverse lamp signal line.
At a minimum, I'll need to wait until a set of reasonably priced memory mirrors become available. If I can install the memory components in the mirrors that are already on my car, I won't need to find a set that are the same color as my car or have them painted.
I also noticed that the seat back tilt function did not respond to input from the memory module. Because I had reused the seat cushions and seat back from my two-way power seat, this would not be an issue for someone who swapped in an entire seat. It turns out that the driver's side memory seat has a different motor in the seat back. It has 4 connections. The part number for the seat back motor that is compatible with the memory module is 404.335
The motor for the two-way power seat and the passenger side seat is 404.334 and it has a two-wire connector.
I was able to source a motor with memory for a good price, and I will finish the seat memory part of the project when I receive it. The future of the mirror memory is dependent on the availability of reasonably priced parts and I may decide it is not a high priority.