I found it
Through the Fiat Forums, UK board. I thought the Uno had an electronic sender, so I posted in the Uno forums, a guy responded that it was the Fiat Coupe that would work, the 16v model, and gave me the email address for a Fiat parts guy in NZ. Basically, any electronic speedo should work. All I will have to do is run a keyed power line to it, ground it, and run one wire to the speedo, power to the speedo and ground for the speedo. When my Speedo cable gives way again, I will leave the housing for the cable and run one wire through it.
Drawback is, I will have to build my own instrument cluster. So, Looking for aftermarket gauges that will work with the Fiat senders will be fun, but any Electric Speedo will do AFAIK. Most have a calibration button, that once it is installed, you find a measured mile, press the button, start driving, hit the mile marker, press the button again. Great if you change tire size or wheel size.
But of course, after always having a problem with speedo cables, I get the sender, and my speedo cable is working fine with no signs it is about to go.....But I am ready if it does......