replacements for BestBilt Casement windows

A handy person from Missouri says:
Several of my windows are in need of new mechanism. Thought maybe I would do them all at once. Appear to be Truth mechanisms: 30740 L.H w/ short arm 30636/20544 and 30472 R.H w/ short arm 30842R/20810. Do you have replacements? And at what cost?

The LONG ARM is 9 3/8"
The SHORT ARMS are 3 3/4" (nearest gears) and 4 3/8"
biltbest window operator
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Mike from SWISCO responded:
Please take a look at the Swisco 39-031 and 39-032 EntryGard Operators, 9 1/2" Arm.
A quick learner says:
The up listed above is different in that the short arm is only one piece. Where as the one I currently have is 2 piece. Are you sure that the one piece will truly work with my system? Or do you have another 2 piece (short arm) system as well?
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Mike from SWISCO responded:
The short arms are two pieces, similar to the ones on your operators.
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