I have now found a dealership with several selec-trac units in inventory. So, they are “out there if you look”.
Much more research needed on my part before deciding. I am unlikely to ever be a dedicated off-road enthusiast. Mostly a city boy who likes to get away every now and then.
Thanks for the input!
Here is another thread on the topic. It might help you with the pros and cons of cv vs u joints.