Searching for Simonton flush mount case

A quick learner says:
July 29, 2020
I am trying to locate a new casing/cover for this flush mount crank. A friend stupidly left a candle burning on the window sill, melting part of the lower left side. I would like a replacement that hopefully just pops in.
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Tom from SWISCO responded:
August 3, 2020

Hello! I think we have just what you need. See our 39-375 to start out. This is designed to work on Encore style operators like the 39-253LB or 39-239B, to name two examples. As long as your operator has the same kind of base then the 39-375 should just pop on.
A quick learner says:
August 30, 2020
As you suggested, I ordered 39-375 Truth Folding Handle with Cover to replace my Simonton parts. The cover fit perfectly. Unfortunately, the new crank handle hole (pictured on top of the original) is smaller than the original and does not fit into the original cog. I need a folding handle that fits the pictured cog (with measuring tape). It must be larger than the one sent to me. What must I do next to return the nonfitting piece? Do you have suitable replacement parts for me?
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Tom from SWISCO responded:
August 31, 2020

I'm surprised to hear that didn't work for you. Unfortunately, I can't tell what size you need based on these photos. Can you give me the exact measurement? The diameter of the hole for our handle is 11/32", which is standard for windows like yours. 

The only size that's larger is 3/8", but that's very uncommon for this kind of window. There is no handle or cover in your style made with a 3/8" hole. Your operators exclusively use 11/32" handles. If you want, you could give something like the 39-104 a try, but I do not think this will work for you.
Handle with a 3/8" Gear Bore
Handle with a 3/8" Gear Bore
39-104
$4.90
Encore Truth Folding Handle with Cover
Encore Truth Folding Handle with Cover
39-375
$11.97
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