Anlin sliding window lock assembly.

These windows are over five years old. Anlin is the manufacturer. They are sliding latches. There are some plastic parts on the interior of the latch that tend to break. I'm looking for either the replacement parts inside the latch, or the whole latch if that's the way they come. Please let me know if you have these glasses available or if you need measurements in addition to the pictures. I will need a half dozen or so. Thanks!