Alfa,
Rob Gray here, the guy rebuilding the CR1 after 26 years.
Go to this company's site....
Neat Lever Latch Release Kit.
I believe they have the original door latches that CR1's used. They also have some far nicer door handles (rather than the crappy Shimano bicycle handles and cables). They also have full solenoid systems if you want to go that way.
I'm personally going mechanical releases. I'll keep the cable system, install the billet handles near the front of the seats on the rocker sill, BUT I'm also going to install billet handles with a Rod attached directly to the latch and install the handles just behind the top of the seat on the inside of the quarter panel just above the latch. This will allow you to open the door from the outside while standing without having to reach down between the seat and the rocker sill. The original placement is great if you're actually in the car trying to open the door, it just sucks if your outside the car trying to get in.
If you review the CR2 forum site, you can see some others that have done this, it's fairly simple and makes for a far superior latch release system.
I'm not a big fan of all the modern electrical stuff on our CRs, kind of out of place and also items that can fail when you need them the most. Good old mechanical releases are bullet proof and far less headaches to install properly.
Also, I don't review many of the other forums, just happened to catch your post. In the future, if you post on the Classic Roadsters II forum, many of us will catch your post and provide feedback where possible.