They pretty much always crack at some point.
Some have some issues, but they all don't crack, I have never seen one yet in person that has, and I owned 3 at one time, still own one. Had one for 20+years, and shot at least 3k rounds through it including a couple thousand rounds of Egyptian ammo before I read on the internet years later that would certainly blow it up and cause the earth to reverse its rotation.
You are right, parts are hard to come by, but you can buy new after market replacement plastic grips, which tend to crack.
They all, as does the original 951 can have issues with the locking blocks breaking, which is why they made it heavier in the 92 series.
Actually the one thing they do better than a hi point is conceal.
Anyway, look for wear on the hammer strut and sear, or if the springs are broken or worn out.