Casement Window part needed

The pictures are of the right hand side of a casement window pair. The problem is on the left hand side, the straight bar that connects the sash bottom to the bottom window frame has rusted at the sash tip and broken the pin that it pivots on at the bottom of the sash. In the "CU" picture the RH bar is part number 31858, it is 7-3/16" long the pin holes are at the ends with a 7" hole center to hole center. The "FULL" photo shows the entire RH bottom mechanism.

So, I'm trying to track down a straight bar of the same size and configuration to install on the bottom of the left side sash and frame.