Help finding new cranks

A handy person from Ashford, Wa says:
Hello could you help find new cranks for these windows both are broken. Thank you
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Tom from SWISCO responded:

What you have here is the old Roto brand operator. These assemblies are unfortunately discontinued and no longer made, though; at this time, we can only supply the base for each side. See our 39-091 and 39-092.

The other components are unfortunately totally obsolete and we have no alternative. I am sorry for the inconvenience. 

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