Truth 45251 window crank replacements

A quick learner from 68701 says:
February 22, 2020
Looking for replacements for Truth 45251 window cranks. The model 39-171 is very close, but the top split arm is 5" long verses 4 3/8" on the 45251.

Thanks,
Phil
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A quick learner from 68701 says:
February 24, 2020
Another possibility may be to replace the top 5" arm on the 39-171 with the current arm and use a 62-014 rivet.
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Dave Sr. from SWISCO responded:
February 24, 2020

Please take a look at two operators similar to yours: our 39-318 and 39-388. See if you could adapt one of these to your window. The 39-171 could also possibly work, but you will need to move your sash bracket to compensate for the arm difference or swap the arm from your old operator using the 62-014 rivet. Look all the part numbers I mentioned and get back to me with your thoughts. 
Truth Hardware Dyad Operator
Truth Hardware Dyad Operator
39-171
$32.55
Rivet
Rivet
62-014
$1.12
Split-Arm Operator, Wright
Split-Arm Operator, Wright
39-388
$36.20
Truth Split-Arm Operator
Truth Split-Arm Operator
39-318
$35.70
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