Needing two sets of replacement cranks

A contractor from Merino, CO says:
This, I assume, is the right hand side crank. I need two of these and two for the left hand side. Thank you for your help.
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Dave Sr. from SWISCO responded:

I noticed that other customers who have operators with this marked number have been recommended the 39-331 and 39-332 operators. However, since we can not see your entire operator or know its measurements, we can not make an accurate recommendation. You may take photos of the entire operator and provide some detailed measurements and we will be happy to confirm whether or not these are the correct recommendations or if there are other replacements we can suggest. 

A contractor from Merino, CO says:
Here are a few more pictures. Thanks for the help.
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Dave Sr. from SWISCO responded:

Thank you for the photos. Please look over the parts I recommended to you in my last response and see if these would work for you.

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