I want to use search/replace (string or regexp) inside a rectangular region (aka column selection?).
Consider this question: Search and replace inside a rectangle in emacs
That's what I want, except I'm not using CUA mode. Maybe I should, but I'd have to disable
C-v stuff and the changes to
The rectangular region selection I use came straight from this question/answer: Enable Emacs column selection using mouse
So, how may I search/replace within the type of rectangle created by that