Cabinet latches have improved a lot in the 60 years since those were installed, and I suspect you may not be able to find the same ones or a close match. If you are really intent on replacing the ones that are broken with the same thing, I would suggest uninstalling all of the ones from, say, the bathroom and using those as your source (plus you will have spares for the future). Then get good quality modern latches to replace all of the ones you removed from the bath. At least that way all the latches in each room will match.

Hi,

I have never seen that kind of catch. It works in the same way that these screen door catches do, and you can still get them. Not saying that you could modify them to work, because they are much bigger. I'm just pointing out someone scaled-down the mechanism and made it work for cabinet doors; clever.

http://www.amazon.com/Ideal-Security-Inc-SK921-Screen/dp/B005TE2L5E/ref=pd_bxgy_60_img_3?ie=UTF8&refRID=1APH7D4M760Z5THRP202