Help identify please!

A home owner from Tarpon Springs, Florida says:
Hello, I have a handyman that will replace these for me if I order the parts. He wants to charge me $50 per window and I have seven. He said if I got the parts he could do it for $15 per window. Can you help me identify the parts that I need to replace all of the mechanisms. And a cost for each. They are very rusted some work some don't. It's very difficult to open and close my windows on my lanai. Thank you very much.
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Bob from SWISCO responded:

Start by looking at our 39-084 , 39-259 , or 39-432 . Compare all the pictures and dimensions, as well as the link arm style, to see if one of these three match what you need. Let me know what you find out. 

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