Replacement Pella Crankset and wing handle

Hello Gentlemen-

We are looking to replace a crankset operating box and wing handle from a vintage Pella casement window. The unit is single glazed with a storm panel.

It is a left hand swing as viewed from the interior.

The existing crankset has a sheared off handle post.

Mark 

Thank you for the reply.
Might you also have the bat wing handle as in my photos in lieu of the crank handle link shown?

Thank you!