Hurd casement lower mechanism

A contractor from Davison Michigan says:
Hello, our windows are Hurd casements and are 18 years old. 1 wood with aluminum clad is hinged right from the inside and is having trouble. The plastic piece that rides horizontally in the bottom track broke off. The lower arm has these markings:
Wright. 07900 on the upper arm. 6N97P on the lowest arm that actually attaches to the underside of the window sah and rides horizontally in the track on the bottom of the frame. The arms are black. The crank is white. Do you have matching replacements. Thanks, John
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Hey, John. It's hard to tell what you have based on this picture, but see our 39-387. Would this be a good match?
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