Need replacement storm door lock kit

A handy person from Downingtown PA says:
October 26, 2014
The locking mechanism will lock when turning the knob and get stuck where it will not unlock again even with a key.
User submitted photos of storm door hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
October 29, 2014
It could just be that the die cast metal parts in your lock have worn out. Take a look at our 40-049 lock set. It's not an exact match, but check the measurements and compare them to yours. I think it's worth considering, at least.
Complete Mortise Lockset, Brass
Complete Mortise Lockset, Brass
40-049
$72.02
How to install the Swisco 40-049 Mortise lock set.
How to install the Swisco 40-049 Mortise lock set.
VIDEO
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How to flip a storm door mortise latch.
How to flip a storm door mortise latch.
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