I don't believe we have an exact match for this storm door handle set, but it is similar in design to our 40-211. I recommend looking over this art to determine if it can work for your door.
A home owner from Zion Grove Pa says:
January 2, 2021
The 40-211 seems to big for my replacement my size is 73/4 in first picture yours is 83/4 do you have one this size
Dave Sr. from SWISCO responded:
January 4, 2021
Take look at the 40-198 mortise latch. This might be a better match for yours. Also take a look at the 40-049 storm door lock see if you could use this one if you need to replace the complete handle set.