2-screw pivot lock shoe / sash guide for tilt windows.

the window was installed 2009 by Camwest in the community Perrigo Heights in Redmond WA
domensions of the part: 
the total hight: 2.16'' (top part 0.78'', lower part 1.37)
width: 0.59''
depth: 0.59''
if no replacement is available, I do have the lower part (last picture), so something fitting the top part would also help to hold the balancer within the window frame.