Window Stop replacement part - looking for 2 replacement parts

Hello,

I am looking for 2 replacement parts for the front window. This is a horizontal sliding window stop (at the bottom track). The housing from the center to the good plastic piece is 13/16" (total width 1&5/8"). 7/8" deep. The plastic stop sticks out 7/32". The plastic part on the good unit, can be pushed in and hold retracted, or pushed in again and it extends to block the window opening.

Thank you

Joe