old corner key for aluminum slider window

A quick learner from Whitland, Indiana says:
I am looking for replacement corner keys for a single pane slider window. Aluminum frame, not sure the age of the house. Outside profile of key is concave for slider track clearance. also difficult to measure overall length. Looks like the 5/16" X 3/16" dimensions are the important sizes. Ends of key are tapered to a point. extrusion pic is of side rail. let me know if you need more pics or sizing. holes are diagonal rather than straight through.
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Dave Sr. from SWISCO responded:

I'm not sure why your corner key is hollowed out, but I believe your best would be to use the 95-110 corner and adapt it to your window frame. I'm not sure what adaptation would be necessary, but I have a feeling it won't be as easy as just plugging it in. I'm sorry that we can't offer a better match.

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