Replacement latches for old wsing out windows

My house was built in 1957 and has a 15-section bay window with the middle vertical row of 3 having a swing-out window panel and a swing-in replaceable storm window/screen as shown in the "context photo". The outer window has a turn latch to lock the window closed. One of the three latches has broken off as shown and needs to be replaced. The inner window/screen is held in place by a two simple spring-loaded aluminum catches. One of these is missing and others are bent and should be replaced. I have been unable to fine either type of latch/catch on line or in nearby hardware stores. I would appreciate it if I could fix what I have rather than have to undertake a more major job.