Odd lock size

A home owner from Chandler, AZ says:
March 26, 2017
I just bought a used screen security door (no idea what brand) that did not come with any hardware. The Larson Brass Mortise Lever Set, Product Code: 40-211, looks like it will fit but I need a 7/8" backset and the screw holes on the face of the door are 7 1/2" apart (compared to 8" on the Larson). The 8" spacing for the screw holes on the mortise itself would work.
Any suggestions would be much appreciated. Thanks!
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Dave Sr. from SWISCO responded:
March 30, 2017
I have a feeling you might need something like our 40-049 handle set. This seems to be a popular handle set used for security storm doors. Look over our pictures and dimensions to confirm if it's a match.
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.
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How to flip a storm door mortise latch.
How to flip a storm door mortise latch.
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