I bought this storm door at Menards 9 years ago the latch broke off as seen int he pictures. I thought it was a Larson Screenaway but don't remember.
Dave Sr. from SWISCO responded:
September 19, 2018
The latch you're showing is an old part used on Sears storm doors. I'm afraid it's been discontinued and is no longer available. I suggest considering our 91-183, 91-158 or 91-159 to see if you can adapt one of these to your storm door.