Re:Storm window latch

I believe your latch is from an older Emco / Forever storm door. I'm not even sure if they're still available anymore. What I've personally done in the past was use our 91-183 latch and "tap" the handle rail a little to make up the difference in height between latches. The 91-183 height is 3/4" were yours might be 7/8". You may want a local handy person to help you out.