Brass crank operators

A quick learner from Ca says:
I am having an impossible time finding replacements for these I hope you can help or direct me to others that might know where to get or have them..
thank you
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Bob from SWISCO responded:

Thanks for writing in. I'm afraid we don't have an operator with the same "bearing" or clip you show at the end of the operator arm. You might need to replace the complete operator with something like our 39-021 and 39-520 track; unfortunately, this will likely require some modification to your sill. Take a look and see what you think.

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