Keyed Lock for Slider

A handy person from California says:
I'm trying to find a keyed lock-handle for my slider. The mounting holes are 3 inches apart. Can you help me?
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Bob from SWISCO responded:

Hello there. This is a bit of an unusual setup. The mortise lock dictates what would work here, and I'm honestly not sure if we have an exact match. Start by looking at our 82-223. This has a similar square face, but it's still a bit different. Look over all the dimensions listed, including the hole spacing, and let me know how it differs. If it matches, you could then use our 82-030 Handle Set and adapt the 82-310 Key Lock to its outside pull. This blog article here explains how. Note however that this handle set has a hole spacing of 3-15/16", so you'd need to drill new holes to use it. 

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