Interesting. Dependency is dangerous for a lot of things.
Along those lines, do you know of a source for foam core twin lead cable? I used it for a lot of RF projects and now it looks like everything went to low loss coax cable. (low loss for coax does not come close to low loss for twin lead.)
Belden was once “the source” for that, but I have not been able to find a replacement.
My first thought is Mouser Electronics in Texas. Another possibility is cablesonline.com, located in New York.