Bengie,
I think one of the other huge problems comes from corrosion inside the bracket attached to the window and the base of the rotating part of the latch itself. The openings in each of these ends up getting wallowed out and the latch gets loose in the mounting. I think there is also a washer or ring inside the latch base which gets either broken or corroded and this also causes loose operation of the latch.
The plastic button is also a weak point as you have noted. That looks like a good fix to that problem but the corroded window bracket "insides" seems to be just as big an issue.
I think we need to find a way to get a hold of these as a club. Like a whole stash of these things. Everyone who wants can pitch in a few bucks to do it, and we can see how many we can purchase. We then charge only a small amount for the part, like 45-50$ so only folks who really need them buy one. I'd be willing to do that.
The next solution is to find someone who can make these things at a reasonable cost. 135-45$ is a ridiculous amount to pay for these simple parts.
