Trying to Identify and replace casement window operator

- The only identifying mark on the operator is a stamped "Truth" on the handle. Nothing else on the operator itself.
- The casement window on which the operator was installed has a "Stanley" sticker, but no other markings.
- The dimensions of the operator are:
Length of outer arm which attaches to window, from center of holes on each end: 5"
Length of inner arm attached to gear mechanism from end to end: 3 3/4"

Casing Width: 3 15/16"
Casing Height: 13/16"

Inner portion of casing which inserts into window frame:
Width: 3 11/16"
Height: 9/16"
Depth: 3/16"
This inner portion has rounded corners that fit into the window frame.

I sent the same pics to Amesbury Truth in search of a replacement and their reply was "Part is no longer available"

Would you have the part or do you have a suitable replacement part? If so, I need two of the same.

Thanks In Advance,
Jack