I've never run into an eyeglass place that won't alter vintage eyewear. In fact, in Red Wing, MN there is a shop that does all the hunting for old glasses, restores them, and puts perscription lenes in. A one stop shop so that you do not have to do the hunting for good frames. Then I look for frames I pick up ones that have screws and not lead plugs. Otherwise, I don't think they can be altered.
Women and cats will do as they please. Men and dogs had better get used to it.