replacement casement crank assembly

A distributor from indiana says:
i'am looking replace a casement crank assembly from a atrium window . the window was made in 2001, so the manufactor doesn't make the part anymore . So any help i can get from you would be appreciated.
User submitted photo of their window hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Your operator looks like our 39-253L. However, that black nylon slide does not look familiar. The slide that normally goes with this operator is the 39-529. See if you can remove the existing slide and install it on to the new operator. If not, the only other solution I can think of is using the 39-529 slide while also replacing the track with our 39-528.
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