left hand operator replacement

A handy person from MA says:
I am trying to find a replacement operator for the one in the picture. The arm with clip is 4" but I can only seem to find 4 1/2" arms online.
operator crank
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Tom from SWISCO responded:

This operator looks like our 39-188 and  39-187. Unfortunately, these only come with a 5" long link arm. We are not able to supply one in 4". One solution would be to swap the arms out. You could drill the arms off of both the new and old operator, then install the old arm on the new operator using our 62-014 rivet.

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