39-107FK Compatible w/39-138?

A handy person from Sausalito says:
I tried these folding handles w/covers for my 39-138, 39-141, 39-142 (white) operators. The spline fits but not the cover.

Is there a cover or similar folding handle w/cover for these operators?
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Tom from SWISCO responded:
The 39-107FK will not work with these operators, I'm afraid. They all already come with covers attached at the factory. They are not meant to be removed or replaced, so no separate cover will work with them. The 39-205 folding handle should work for them by itself.
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