Inside handle for storm door

A quick learner from Maryland says:
The inside handle on my storm door broke. You can see the remaining piece which has a small set screw on the side and slides onto a square shank. The other end/side of the shank is a round knob that says "Security". I know it is very old and was quite brittle. It can be locked on the inside by sliding a piece around the circular base.
Thank you.
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Casey from SWISCO responded:


We'd be happy to help but we'll need to do some research to see if there is a more modern replacement for this older handle. We will reach out to you as soon as more information is available. Thank you!

A quick learner from Maryland says:
Thanks! The storm door is very narrow width-wise. It is only 3/4". (.75")
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Dave Sr. from SWISCO responded:


Our best replacement option appears to be our 40-035 door knob latch but keep in mind that it is meant to work on doors 1" to 1-1/4" thick. Since you have a thinner door, you might have to reuse your old spindle or cut the new one down to size. Take a look and see what you think. Thank you!    

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