My old windows and their casement ops

A quick learner from Utah says:
September 30, 2020
My research has led me to 39-027E, and it's opposite, with new window channel things...as the closest I can get...
I'll need 5 total, 4 right (I believe) and 1 left, with handles, and the channels for the window.
Before I order, am I on the right track?
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Bob from SWISCO responded:
October 5, 2020

These are old Andersen operators that are no longer made, but you might be able to replace them with our 39-365 and 39-366 type operators, as well as the 39-504 track. Take a look and see what you think. 
9-1/2" Single Arm Operator, SS Roller
9-1/2" Single Arm Operator, SS Roller
39-365
$30.99
9-1/2" Single Arm Operator, SS Roller
9-1/2" Single Arm Operator, SS Roller
39-366
$30.99
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
SS 13-3/4" Channel Guide
SS 13-3/4" Channel Guide
39-504
$6.65
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