Latch and keeper combination

A quick learner from Florida says:
I have aluminum single hung windows with Alcan hardware. The 90-009 latch (white) is a good replacement for my latch and I can pair it with your 90-109 keeper but I do not see a compatible keeper offered in white. Can the 90-282 (white) be surface mounted on the upper sash to mate with the 90-009 or do you have a better option. My center to center spacing 2-1/4" and the latch hole set back is 3/8"
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Bob from SWISCO responded:

To be honest with you, I think you might be better off with a sash lock of the same style like our 90-180 . This lock has the 2-1/4" hole spacing, as well as the 3/8" backset. It works with the 90-183 keeper. Take a look and see what you think. 

A quick learner from Florida says:
I looked at the 90-180 before posting my question. The top of my movable sash is 13/16" deep. It would appear that the 90-180 is about an inch or so deep and would overhang the face of the sash. Except for this foot print, the hardware is compatible. However, your 90183 keeper is a dead match to the Alcan. Thanks for the feed back.
A quick learner from Florida says:
What is the footprint depth measurement of the 90-180 ? I did not see that information on the images.
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Bob from SWISCO responded:

The depth of the 90-180 , at its thickest point, is 1/2". Let me know if you have further questions. 

A quick learner from Florida says:
To rephrase my question, how wide does the sash need to be for the base of 90-180 ? The photo with measurements does not show this depth.
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Bob from SWISCO responded:

Apologies! The overall depth, or rather from the front to back edge of the lock body, is about 15/16". Let me know if you have further questions. 

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