I am in need of two parts for a Duo Art grand transmission.   The
parts are the main drive sprocket and the main ladder chain that goes
between that sprocket and the air motor.  Specifically, the drive
sprocket is 2 inches in diameter and is mounted on a 1/4-inch shaft.
It is held on the shaft with a set screw.

This is the Duo Art style in which the air motor is mounted in the
vertical plane and requires a long ladder chain to connect to the
drive sprocket on the transmission.

My need is immediate.  I hope someone can help.

Bob Taylor