Wartian Storm Door Locks

Does Wartian Lock company still produce storm door lock sets? I have three storm doors, two of which have the original door locks manufactured by Wartian. Having looked online for similar parts and/or replacements, they are obviously very old. Also I have been trying to determine the manufacturer of the doors, which I now assume to be sears given sears used Wartian locks on their doors.

Do you know where I might find parts for these locks and possible a complete set for a left side outward swinging door?

I can tell you at a glance the replacement you suggested might work but the measurement of the outside pull is wrong. I have one of these locks on my storm door. 

First, the top of the inside latch holds the top of the outside pull handle. The 1 3/4" measurement for the top two screws is correct, but like mine the bottom of the outside pull is going to be 7" so while it might be okay if a person wants to drill a new hole to match up and figure a way to close the old holes. 

I am confident in saying that is 7" because I have come across this lock on many aluminum framed storm doors in this area. The storm door on my own home is so unique I wouldn't dream of replacing it, and the outside pull handle is clear round lucite material. The spring on the inside latch is the weak point. Getting a new spring inside would be a project for someone else as the pins holding it together would be ruined taking it apart, they are a rivet style on one end and little round ball on the other. 

Personally I am going to just try your inside latch and hope the push rod works with my outside pull.