Roto casement operator

A home owner from Home says:
June 19, 2017
Good morning. Attached pleas find pictures of my Roto casement single arm operator 7-1/2". I can not find it on your web site so my question is do you?
Question 1) If you do not carry a 7-1/2" operator can I use the old arm on a new operator such as a 9-1/2" one such as a 39-430?
Thank you in advance
Operator
A quick learner says:
July 6, 2017
Good morning, I am looking for a Roto single arm casement operator 7-1/2". I have purchased a Roto single arm operator
Item no. 39-430 and 39-429 which are 9-1/2" and they are perfect.
Please help.
Thank you in advance
Bob

P.S. I need a left and a right.
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Tom from SWISCO responded:
July 12, 2017
Thank you again for your continued patience. I know it's been a long wait, but we finally tracked down a 7-1/2" version of the 39-430 that I think will work for you. Please give us a little more time to have it made up and I'll let you know when it is available.
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Tom from SWISCO responded:
July 28, 2017
Okay, we finally have the new hardware up. Our 39-434 and 39-435 are now available for you to review!
Roto Single Arm Operator, 9-1/2"
Roto Single Arm Operator, 9-1/2"
39-430
$28.90
Roto Single Arm Operator, 7-1/2"
Roto Single Arm Operator, 7-1/2"
39-434
$21.70
Roto Single Arm Operator, 7-1/2"
Roto Single Arm Operator, 7-1/2"
39-435
$21.70
Crank Handle, 11/32"
Crank Handle, 11/32"
39-114L
$4.42
Truth Folding Crank Handle, 11/32"
Truth Folding Crank Handle, 11/32"
39-205
$11.70
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